Fenway needs an overhaul. It looks really cool on the inside, and I actually like all the upgrades the ownership has done - the signage, monster seats, etc. That stuff is good.
But I've been in the locker rooms, dugout, played on the field....etc. Locker rooms looked old and beat up. The visitor's dugout bathroom looked like one in the Port Authority. The seats are way too small, and point in the wrong direction in many parts of the ballpark. As much as I dislike the fan base, they are passionate about their team and deserve better. I saw a player poll once that listed Fenway as one of the worst parks to visit.
For one game or two it's fine, but, if you go to multiple games, the seats can get uncomfortable. Nostalgia is fine, but eventually you should upgrade. Most Boston fans disagree, though.
I just think a modern version of Fenway, one keeping the uniqueness of the original park intact, with all the good parts of a modern park would be really cool.