You must have been a warrior, rogue, druid, or warlock if you enjoyed BC. If you were any other class BC was terrible. I will give you that Kara was fun but after that the raids seemed very flat until hitting BT and Sunwell. All that space in between was horrible. Wrath was where it was at in WoW. PVP balance finally started to exist and the raids were interesting.
Now as for SWTOR PVP it is pretty horrible right now. Only having 3 warzones and no other form of PVP is causing most of the pvp player base to burn out quickly. Ilum was a good idea in theory but it hasn't played out yet. The massive gear inbalance between Battlemaster and a fresh 50 discourages any new players from even trying in WZ's.
Bioware needs to make some changes soon or the subs will continue slipping away.