By "less fun" you mean that it has better raiding? Than you would be correct. You mean it has more to do? Than you would be correct.
But more grind? I wasn't aware there was anything to do in TOR aside from grind, PvP, and run FPs. The only thing that ISN'T a grind is running the FPs. At least in Rift I can complete achievements (yes, achievements, not dumbass codex entries), go artifact hunting, do Rifts, do dailies, grind for mats, play PvP, run dungeons (Expert or Master Mode), run Chronicles, run raids, do Instant Adventures, all while collecting XP at max level for Planar Attunement which makes my toon more powerful by allowing me to upgrade my stats without having to buy better gear.
Yes, you're right. TOR is so much better with a much larger variety of things to do. /sarcasm
---------- Post added 2012-10-09 at 10:30 AM ----------
That sounds like it might be a sick expansion.