There have been 3CP push maps that didn't play well before, though I doubt anyone from comp treated them seriously.

If you really want new maps and ideas, try partnering with the people that make them and not crushing them with feedback like "it's a shit map that no one has fun on" and instead give them something useful to work with. Learn to play indev maps too--it's a lot easier to make huge changes and do it faster when a map is just dev textures.

just put a func_detail blockbullets brush rather than playerclip on stairs and it functions the same as a ramp