crevice gets into the vote too often, a lot of good map is not played at all. oilrig is a good map imo, but I haven't played for a very long time now. I don't have any problems with dropdown either.
you can only extend a map 2x, second extend the vote will always be F5 (in case of F1 pressers) But, in the end, if people want to play it, let them play it. i like it too.
How about adding Hakurei Shrine with some tweaks? I just dont like the upper hill. I think that might be a problem. And maybe that one castle map