Really - the storylines in The Old Republic are generally smaller than KOTR's. Admittedly I haven't played it since its first year or so, but each base class had its own story which was mostly independent of the overarching world.
The big thing which I felt was a missed opportunity for The Old Republic was the lack of asymmetry between the Sith and Republic sides other than cosmetic differences.
The only other issue I had with it was following MMORPG tropes too much. Overall though a game with 8ish decent KOTR lite campaigns.