idk the idea seems nifty for regular season, but playing a whole season to end up in playoffs with none of your good maps seems terrible and takes away the aspect of the best team winning. i agree with GJ3 about having a varied map pool being super important, the main reason there isn't diversity is because teams don't want to win enough where they start practicing on more than the main pug maps. at least with the new maps and some of the newer teams a lot of the newer maps see play and people end up enjoying the maps rather than just saying new maps blow (ex. bagel, sultry, and clearcut). overall, i wouldn't be against trying it for regular season for maybe some lower divs, but invite teams should be trying to play more maps to expand their map pool to give themselves the best shot against the best teams.
TLDR: Interesting idea, PLEASE DON'T DO FOR PLAYOFFS. People should be trying to play more maps to give themselves a better shot at winning. Also fuck metalworks and snakewater, boring ass maps. replace one of those with some koth map or new map, after some testing/new map cup have a talk with the invite peeps to decide if we are only testing new maps with adv/invite teams at first.