I want to know that my crew will be more than walking sets of abilities and gear.
Unlikely. The problem is that there are so many of them. You may get some reactions in terms of +/- affection since that costs Bioware basically nothing and at most they might mail you letters, but I doubt there will be anything that involves voice acting. This is the drawback of fully voiced games: you need to hire an actor back to add dialog for any character. It's also why the new companions will probably be either available to all (like HK-47) or at most faction specific (i.e. not one per class).