I can understand with the camping spots. It does delay the round a lot and that's where humans would go as a last resort. I do like the idea of having swarm being able to access those parts to get the remaining humans who stay in those spots. Either way, humans will meet their end somehow, if they play it right.
Ladders, they can burn for all that matter. Having different ways with ramps or other access points, as you presented here, would be better. It would end the "Dying due to ladder" part easily.
Apart from that, I do agree with Stickz. It is one of the maps that is played a lot and if there are changes to it, people might be disinterested and leave. It is a risk that could be taken but maybe like another version of the map that can be voted like breach is?