It gets old to me every so often. Still, since I still have fun playing, I just take a few months off at a time and reactivate my account later. But that's not the question, is it?
Actually, the fact that they poured everything in the expansion into the pre-endgame fills me with hope. I've always loved the journey in MMOs more than the destination (not to mention raiding and PvP hold no interest for me), so the idea that there isn't much else waiting at the end doesn't affect me much; I'll just play one of several alts, build up my one-man commercial empire, explore places in the world I never got to...or, failing all else, take a vacation to Loch Modan.