I'm gonna catch heat for this but I'm fine with it ending. Let Larry go out on top rather than letting it drag out. Honestly if it weren't for the long hiatus between seasons 8 and 9 the show probably would have ended a while ago anyway.
The bigger issue is HBO being severely crippled in the comedy department now that this is ending.
This won't happen, but if the finale doesn't stick the landing (and I have no reason to think it will be bad), I would find it funny if, in a year or so, Curb came back to do a 'reunion' within an episode like they did with Seinfeld. I just found it funny in that season where the entire Seinfeld cast kept talking about making up for the finale, but Larry's the only one who went "There's nothing to make up for!"