You mean cut a hole in the bottom for a psu vent? (as in the cm690) if so then I fully agree
For a place to put a rad, there's thoes two 140mm fans in the top of the case, looks like a great spot to me
I had another look at a couple of reviews of this case, one of them did mention the window is a bit flimsy as the purspex is a bit thin. also mentioned the motherboard cable length problem.
Looking at the pictures seems like there's a bit of a gap between the psu and motherboard, annoying becuase it could of been so eaisly fixed at the design stage.
I think it is crying out for a couple of simple mods.
-hole cut in the base for psu
-cut away grills on the front fans (they are still behind the mesh front and filters)
-cut a couple of additional holes in the motherboard tray for better cable routing
-replace/reinforce the window.