Meh. I liked Oblivion. Sure it wasn't as good as Morrowind, but honestly, it was still pretty good. If you think the combat is bad, go play Daggerfall or Arena, those games will eat you alive. Yes, the leveling loot system was a pain in the ass. But to be honest, it was easy as hell to gain levels. I got to 21 in 2, 6 hour playthroughs. That got me to a good point that the loot would be quite good.
For the voice actors: It didn't bother me. I played Morrowind to death, so I'm immune to being picky about stuff like that. Hell, I was missing the old Dunmer Male Voice Actor. But I digress, the VA wasn't as horrible as people would love to paint it.
Combat evolved better in Oblivion, Morrowind contained traces of the old Combat system, so it got bad at times regarding fighting.
Skyrim looks to be better than Morrowind and Oblivion, so no worries about the sequel.