Your3rdShadow

Koloss according to MAG lose whatever Allomancy or Feurchemy they had upon making the transformation, or at the very least, they can't access it anymore. So I would think that the alteration of the Koloss process overwrites the spirit web too much for the magics to flow naturally. As for the Koloss-blooded, as pointed out, they can still use the two magic systems, as such, I believe that justifies the perspective that their merely slightly altered humans, better physically in every way, but still pretty much normal.

You can wallrun/walk with A-Iron anyway, so long as the surface/building has enough metal in it. That said, the pulling weapons and catch/dodging them bit is indeed awesome. That right there is fuel for some truly badass fight scenes.

Dammit, this is adorable. Uhhhhh, I want one now, and I don't even like ponies.

Well, in MAG there's a stunt for slider's and pusler's that basically says they've learned to account somewhat for the deflection of their bubbles, and thus become more accurate. So presumably it could be something like that, although I don't think it's likely. Also there's a WoB where he explains he did not actually have a concrete reason for the bullet deflection effect of the time bubbles. So until he says otherwise, or someone informs me of a quote I missed, technically, it could be any of dozens of different things.

I'm actually playing a MAG with a Blur on saturdays, we had discussed that. You can use it that way, but I personally don't think that's the most important use of the power combo. To clarify, sure you can save on using steel by making a bubble, but you still have trouble shooting out of it, and anyone caught in it with you are subject to the same benefits you are. So really, the only benefit to using them separately back to back, is that you can move your bubble farther, faster. Where as if you use them at the same time, your basically time compounding. You can achieve so much more in 5 minutes than either power by itself could ever hope to accomplish.

That's called a blur, and they are terrifying. Slider's are already hard to see(if not outright invisible) in their bubble and can do so many things in them by the time the bubble goes down. A Blur, could build a house in 5-10 minutes with enough stored speed, which as you stated, would be easy for them to store. They could search a building thoroughly in a minute(Assuming they can make their bubble big enough), kill and dispose of a crowd of people in the blink of an eye. The possibilities are scary man.

Although I think it's been sufficiently answered, to throw another WoB into the ring, he has stated that the people of Scadrial will achieve effective space flight, long before using up all the planet's metal. This of course working on the basis it doesn't return, which apparently it does. I wasn't aware of that, but I look forward to the point in the mistborn books when people talk about the random several ton cubes of metal that dropped out of the sky one day.

Harmony may not have a shardpool at all. I'd think a shardpool only forms after a shard becomes attached to a planet like Ruin and Preservation were. Harmony hasn't existed long enough to become attached to Scadrial. He could leave at any time if he wanted. There's a WoB saying that would have some pretty drastic effects if he did. I wonder what those effects might be.

Not necessarily medical care. Could be the extra Preservation in everyone makes them slightly tougher than other humans.

I believe there's a WoB somewhere where he stated that all alloys of Atium are temporal in nature. Just throwing this in here. That aside, I like the idea that Steel/Iron Atium alloys age metal forwards and back respectively. Super neat idea.

A. Luck ferrings happen breh, you ain't always going to be on their side. B. When I say Hazekiller tactics, while I do include the traditional meaning, I'm also referring to any tactics at all that might be useful against metalborn. C. I will absolutely use steel pushing, provided the Chromium ferring doesn't get lucky and my vial breaks somehow. D. So what that I can turn metal into bullets? That doesn't remedy that the guy I'm shooting at just tripped and avoided my bullets. E. The best way I can think of to beat a Luck ferring, is put them in a no-win scenario, which while it sounds obvious, is harder than it seems while their burning luck.

It relates to the secret histories, I would have included more detail, but I'm not sure how to do the spoiler thing.

Sliver status, beyond denoting that you once held a large amount of shard power, also means you've been altered by it. Say you became a Preservation sliver, you could ignore moving on after death if you so chose. I'm not quite sure what all being a sliver entails, or what the effects are if said effects vary by shard, but you are without a doubt altered by the process on the physical, cognitive, and spiritual levels.

Well the cost might not be super terrible, after all, allomancy only requires a few flakes of pure metal. Sure the initial cost of a large quantity of bendalloy and cadmium would be high, but if you used it right and sparingly, it would pay for itself in no time. Lets look at a restaurant scenario. It's a simple case of quantity over quality. My theoretical restaurant specializes in catering super big events. Get a Slider in the kitchen and presto! After the wedding party sits down, fresh, huge quantities, of food come out of the kitchen in 5 minutes. Meals that by all rights, should have taken hours to cook, and they did, in the bubble. Payed for itself right there. and I could feasibly do this multiple times in one day off of just a small pile of Bendalloy shavings.

I've thought about that, but the problem would be getting into the bubble without getting shot. Sure firing out of it is just as hard to fire into, but the guy inside as around 60x the chances to hit that I would while I tried to charge in. Of course so long as he's not using aluminum gun/bullets or coinshot hazekiller rounds, I'd probably be fine, but that's not a risk I want to take if I can avoid it.