Lore-wise, I'm not liking the current direction. I'll be completely honest. They already did the "Chaos won!" story with the End Times, and now they're saying that Be'lakor's story means that Order is getting screwed over yet again, and the Realms are "a horrible place to be," in their own words. They say that Order is attempting to strike back, but it definitely seems that they're trying to move AoS more to the "grimdark" side of things, probably to appeal to 40k fans and people who didn't like the high fantasy aspects of AoS when it came out. I expect most 3e stories to be more like Be'lakor where Chaos/Death/Destruction usually win and Order either gets curbstomped or only manages to squeeze out pyrrhic victories. This of course means more Seraphon humiliation and defeats. I can only hope that the art of a Slann putting up barriers around all the Realms we saw means that maybe we'll actually have some hand in fixing the problems instead of causing them.
I like the new Stormcast for the most part. Although it seems weird that they have now another big beatstick model (I'm assuming that's what she is) and yet more infantry options. It seems that most of their army is getting redundant as they have more foot soldier options than pretty much any other army now.
Kragnos himself is pretty cool, although I think everyone was assuming that he'd be leading his own new faction. Instead, he's just kind of like "hey, I'm here!" and is just a possible inclusion in any Destruction army. Not looking forward to seeing him humiliate Kroak and the Seraphon in his book, though
3e, I have no idea what to expect, other than what we're heard rumors of before. The idea of "core battalions" sounds good from a purely balancing perspective, but I really hope it doesn't mean that all the faction-specific battalions are getting thrown away. Yes, some of them are definitely better than others, but I hate the idea of battalions being reduced to everyone having the same battalions and effects, kind of how they dumbed down the Realms rules and made them essentially useless.
This "age of the beast" idea being thrown around sounds like it could mean that monsters are going to get better. I hope that means our monsters get some love as well and it's not only Destruction and Chaos that gets the good stuff. If they added the "might makes right" rule to all monsters that would suddenly make them much more attractive for holding objectives and gaining points. Especially since the board sizes are almost certainly getting smaller, I'm guessing they're trying to move away from the shooting meta and make AoS melee-centric like 40k 9e is now. If monsters were able to hold objectives and weren't as vulnerable to being sniped off immediately that would be interesting.
They also mentioned that they loved the double-turn and wanted to keep it, but also wanted to add even more options for going first or second. He specifically said that the decision would be harder and that going second means you get more command points, so I'm not sure how they're going to be changing how CP are generated. I imagine there's going to be more actions that require CP usage, if charge reactions are indeed coming and there are other new mechanics they're adding that rerquire CP. I'm guessing that's why the Lumineth got so many CP-generating heroes when their army doesn't have much to use CP on currently. They wanted to make sure they had CP generation for all the new CP uses they're adding in 3e.
Overall rules-wise I'm predicting a 40k-style shift to smaller board sizes, melee becoming better than shooting due to turn 1 charges being a lot easier for most armies, and CP generation and spending being more important. I'm sure that teleporting will still be a good thing to have, but with smaller boards it won't be the main thing that sets the top-tier armies apart from the rest. I also think they're attempting to somewhat balance out the double-turn mechanic so that it doesn't always end games by turn 2 or 3 by giving new and different options to players based on whether they go first or second in a round. I think games might actually take longer, though, since it seems like they're adding in a bunch of rules for new things to do in each phase and options for the opponent to do things in your phase, and vice versa. As a final note, the comment about you having to look at your army in a completely different way makes me think that at least they believe that the new rules are going to drastically shift playstyles. Looking forward to another couple years of theory-crafting and list building, lol!