The following maps would be great to be remade:
2Strong2 -
Give the spawn rooms doors to lock people in during warmup. Give it a groovy new motif. This map would be awesome to see back as official.
Gensurf4 -
I completely agree with Nitrogen on this one. This map would be just as good, if not better than 2strong2 to add to the official list.
Aggressor3 - Acid - 2Castles
Other good options.
Beyond3 -
GO RAV GO GO GO
Spiff this bad boy up and throw it in 3.6 YAYAYAYAY. =]