good stuff, good frames, im not bothered by looks tbh. only place were framerate drop drastically was in the generator room with the two rotating water wheels.
and i think the map is big for too reason:
a) the map wont be assaulted any further than outside because the canon control room cannot be assaulted, its like Astheno obs door.
b) especially in the end the mapper got lazy and created loads of long narrow tunnels with an occasional box to add to detail probably but narowing the passages even more, that is even narrower than guardia in a *lot* of places.
conclusion there are a couple of maps that are similarly league suited (ie a similar amount of work is need to make them assaultable and defendable)