DA2 is a weird game to me.
On one hand, it clearly has a large amount of shortcomings. The game is 80%+ combat. And only very few of those encounters are interesting. Even worse, when you play on Hard, you have a mixture of ridiculously easy fights, mobs that just one-hit your entire party without warning and proper, challenging fights. The last are of course the smallest part.
The character system is also a mixture of extremely strong skills and useless ones.
Sometimes, the game will try to sell you that something bad happened, yet totally fails at displaying it. Like at the beginning, when you are supposed to end up in an overcrowded refuge camp, with everything that should come with (dirty, lots of people, despair, etc.). The game shows you giant, clean structures with probably 20 people in it. Wtf? If your engine can't handle a large number of NPCs, come up with another story.
While the game a selection of areas you can go to, and is rather open in this. Every location on it's own is nothing but a corridor. It's really, really bad.
I could go on with the issues...
But, I played through the entire game in few evenings and must say that I had fun. Not the most amount of fun I ever had but certainly good-for-what-it-is fun.
Most of the issues I had with the game are not engine related, so switching to a different one probably will not have an impact on my experience. Other things are more important.
Are the buildings and scenery props at least destructible? This being the same engine that powers BF4, i would expect the levels shown in the video to be littered with shit blowing up.
Don't know if you are serious, but useless stuff like that in RPGs just distracts developers from important things, so I hope this will not be a feature. Also, destructible buildings require a lot more effort than just the right engine. You have to take this into account from the beginning when designing to the artists that create the buildings. How are they going to fall apart? You can't just use voxel logic here. really, this is something I do not hope to see outside of games like shooters. Or Minecraft.