First of all spawns near the flags are bad for gameplay, because encourage spawnkilling. If you really want a spawn near that place, create a hole in the wall, or a hanging platform for it.
The thing is to put players quickly in the main action. I'll suggest removing almost completely the first hill.
Maybe add some important spawns in some route that's not that used (I don't know exactly, but maybe the "middle" one is not)
I would add a huge hill in the middle to make the lower route nearer the others, but that would make it really quicker, so just a plateau should do the trick.
Ohh, and there's that awkward island that I don't know what to do with it, because if you remove it the map will loose it's idendity.
good luck ^^ I'm sending you an img