The story is the meat of this game, so it's a legitimate point to criticise. It's a problem if it's quantity over quality. Also one quest line on each planet is class specific. The rest, while more interesting than the regular MMO fare, is not something I want to repeat 4 times.
I haven't played the game enough yet to know, but I see myself probably quitting after playthroughs with one imperial and one republic character. Anything beyond that seems just like grinding and twinking out, which I explored enough in certain other games and don't have the time for now.