Kem0sabe
Arcane
Probably. Remember that they are part of EA and they have access to all their tech and support. The technical problems and limitations related to previous games mostly had to do with their continued use of the NWN engine.
So we can expect something like a heavily modded frostbite engine, hmm.
Would be nice to have a mage destroying a building with a fireball without it being scripted, but then again i don´t think Bioware is that ambitious in terms of design.
Also another thing that bothers me with trying to emulate Skyrim´s open world design, the amount of resources and the cost of developing that many assets without having the world feel like a random generated piece of crap will probably eat up on Bioware´s already week world design, writing and characters.