You mean metagaming. Because I don't see this promoting crap, except for that. All I see is; Player goes into a zone -> 8 abilities locked -> gets his as$ handed to him because he can't access talents that he knows are useful here -> loads game -> changes up abilities before entering zone -> goes in and deals with the enemies.
Tactical gameplay involves adapting to the situation and using different talents with differing combat conditions. This doesn't occur when you're pinned down by the same useless abilities you used in a different scenario.
Well, then maybe we play different. From the footage I've seen you can see your enemies most of the time before engaging. At the Fallow Mire our scout leader lets us know what we're going against. You probably have at least a basic idea when you set the mission on your war table map.
I don't anticipate you'll be thrust into a situation where you have zero idea of what to expect combat wise unless you aren't paying attention.
Dragon's Dogma did something similar, although you couldn't change your abilities in the field, and it definitely made me plan ahead and think about the encounters I was about to have. I may not have liked it sometimes, but it worked.