Maybe this is a sign that the ridiculous Rachel-Joey pairing will end during this final season of Friends. I believe that ME2 disagrees with me (just a sign that we aren't actually the same person) on this one, but I found the whole Joey-Rachel-Ross to be tedious and uninspired if not downright uncomfortable. Their kiss during the season finale didn't strike me as a passionate-hurray-they're-finally-kissing-moment. Instead, I felt exactly as if Ross had kissed Monica. Eeeeeew.
I think Joey has been under-used on the show, but he certainly deserved better than to be tossed in with Rachel. I can't root for them. Sure they'd have gorgeous kids, but my goodness they'd be dumb.