The "Great Wall Of Flushing":
You may notice in this version the seats in this section are now barstool seats modeled after Fenway's first row of monster seats. The seating ends just before the hanger door so that it can still function. This also leaves outfielders a nice amount of space in the Left Center Field gap where they can take an unobstructed shot at bringing back a homer.
The "Mo's Zone":
Cringe-Inducing Blue For Those Of You Who Are Into That Sort Of Thing:
The Shea Bridge at Citi Field is a nice aesthetic touch and a great place to watch a game, but unfortunately it is completely camouflaged and one of the dullest parts of the park visually.
While I generally oppose the whole "blue walls thing" this is one are of the field I would like to see painted blue. Since it's the Shea Bridge, paint it the same blue as Shea. To take it one step further, adorn that dull area above it with smaller replicas of the neon figures from the old ballpark.
If you really want to get crazy with them you could have the corresponding figures flash when a play is made. (i.e. the runner for a SB or the pitcher for a K) Maybe I'm just trying to bring back my youth when the "E" in the Manufacturers Hanover sign would light up after an error.