As a casual, I have mixed feelings about this. My Sentinel is more interesting to play than my Scoundrel, partly because of what I have to manage. On the other hand, I fight best on my Sent when I watch my hotbar rather than the fight ensuing above it, despite the fact that I have carefully hotkeyed nearly every power; with my Scoundrel, I rarely watch the hotbar and do just fine. In addition, if I get at all distracted while playing my Sent, my companion and I take heavy punishment quickly. With my Scoundrel, playing well takes focus, but the self-heals mean a mistake probably won't be deadly.
To answer the OPs question, I think the class will eventually be streamlined somewhat. Not necessarily a lot, though. I think Bioware will carefully watch the number of players who roll Sentinel, then give up to play an easier class. Once they have enough data, they'll make whatever changes they feel that data warrants.