8 active abilities limit on the UI is not core to the gameplay? Shaping your character through atribute points is not core to the gameplay? Or perhaps day/night "cycle" in DA2 didn't add additional layer to storytelling?
Nope. 8 active abilities is probably all I actually used on a given character in either game since some abilities were usually clearly superior to others. If they actually make us make difficult choices between what load-out to use by having more than eight abilities that are actually useful for a build, then that's an improvement.
Shaping your character through attribute points is MASSIVELY overblown by some. It really came down to a couple of extra points in con or willpower. You still had the core abilities you used for any given class- Strength/con for Warriors, Dex/Cunning for Rogues, and Int/Will for Mages. That's the core mechanic, and it hasn't changed. And you can now craft armor to customize your build (see +6 Willpower armor on Sera in the latest gameplay), so all that has really changed is a focus from using your attribute points on level up to one of crafting the ability set you want. Not actually a big deal, and it saves space since they were doing armor customization anyway.
The ability to change day/night added atmosphere, but with all the different environments- some of which ARE night or stormy -DAI has far more atmosphere than DA2 did. The day/night cycle was a way to get extra use out of the same maps, much they way they did with the caves, albeit a more palatable one. Abandoning reusing the same map with a cosmetic change in favor of actual additional environments is a positive change.
To sum up- Not one you mention was a core gameplay mechanic.