Stormlight can easily be generated,
Even for modern countries you can't just replace artillery pieces like that. And how many would they need to actually make a half-decent barrier? Tens of thousands at the least. And you can't redirect the boulders as they will be pulled towards where the artillery is, and you can't hit them because you can't aim artillery that quickly.
Because if Kalak was so desperate that he would tell people to be on the lookout for people from the same country that Ishar is currently in, he would have spoken to him during the previous thousand years.
Back to sleep in ten minuets? That's not realistic for brand new recruits during their first time at war. And they would make a lot of mistakes like only having two guards with no night patrol, especially at first, because they've never been to war before.
And why would they abandon it on the spot when they can still complete the mission without risk?
It wouldn't be huge, just a sphere around their head.
Taln's mind was restored because a radiant ideal was said, just like how Nale's mind was restored at the end of Edgedanncer. And Illumination doesn't use the CR, so the realms being close doesn't matter for it.
Not necessarily. As long as it causes some form of distress it pushes Dalinar closer to breaking. Even the memory of trauma can be enough at times. And considering that Dalinar was practically comatose for the next week I'd say that it was effective. Compare the time at Vedenar to Theylan city. At Vedenar Dalinar feels the Thrill, Taravangian approaches him with a moral dilemma, and Dalinar is excommunicated. At Theylan City the secrets of the Recreance, the visions with Odium, and the Highking come out. Each time it is three problems, and Taravangian is behind them.
Additionally Taravangian is working with Odium, if Nahel spren could be imprisoned in gems that easily they wouldn't have needed to make ani-stormlight. And Raboniel has studied modern fabrials, so there is no way she wouldn't know about it.
Even if your professor teaches you all the mechanics of something doesn't mean you can put it into practice. The Set's scientists are all essentially college graduates, who had just been hired to build rockets. They might understand all the principles, but they don't have the experience to put it into practice.
Where'd you get that?
When Wax and Steris are talking about shipping the bomb into Elendel Wax says that the largest thing is the generator, because the amount of electricity needed exceeds industrial cables limits, so they couldn't get the electricity from the city.
And you know for a fact that it is fission because?
Even if somehow over ten years they didn't get a single squire there are two bondsmiths, and I highly doubt one attack would kill both of them. So the one left an teach new ones, or they could write a book about it. Or countless other ways to preserve their knowledge.