Nice work, looks great.
Always touch buttons please!
Only slight criticism is personally I'm not a fan of stairs clipped to be ramps (mainly because it looks weird when in use), especially larger ones, but they certainly look cool the way you've done them and I'm probably in the minority... Also, something related I've thought for a while (but not specific to this map as I wouldn't suggesting for a moment changing any of the original ramps into stairs) is that stairs as stairs are an underused part of FF map design in general.
Really good job - looking forward to playing it now