I like it better, so yes you should totally read it.
Do note there is a bit more sexual content than WoK but you can see it coming(and I can tell you where) and skip to the end of the chapter if you want.
Not neccesarily more investiture, but more noticable, lightweaving is kind of like a natural coppercloud, albeit a very weak one.
Pattern notices that Shallan's lightweaving is more "quiet"
That works.
Also you should really look into it, I recomend "What they don't tell you about the Tarasque" and "What they don't tell you about the Litch" respectivly.
The stormfather's power is not Dalinar's though Dalinar does gain some powers by being bonded to the stormfather others do not, riding the storms, playing visions outside of stomrs, the map he's able to allow Lightweavers to make, etc
Not likely Connection isn't enough to do that, though Dalinar might be able to cut off their access to Odium and force them to decay into ordianry souls.
I really recommendd you check the arcanum and coppermind for these types of questions, as they might help you out.
I'm totally willing to answer any you have but I feel it would be something you enjoy.
This is theoretically possible but we don;t have any confirmation on it.