I agree there are some minor issues but having run around the map it's got more good interesting ideas than it does weird issues. He probably should have just released it for everyone to play, no idea why he didn't do that. For instance, the map doesn't seem as big when you run around it, even if it is a large map, because the rotations are so fast.
As for the example you pointed out, it's right near the CT spawn, so that's not as OP as it might seem. etc