in RGL they basically decided that they would not entertain the idea of old maps being updated (blands, granary) when new ones are being updated because it would be 'a giant middle finger to mappers' (or something along those lines, makka was talking about it on stream a bit ago)
logic doesn't really make sense though cause the current way of doing it just forces shitty underdeveloped maps into the pool that everyone inevitably hates (cardinal, villa, propaganda, clearcut/bagel to a lesser extent because koth is inherently fun and much harder to make a bad map) and people in general are so closed minded that after you put in an early version of a map they will not want to reconsider it
villa is the only new map that has ever been kept in for more than a season afaik but there are still no major changes or proposed changes to show from all of this testing, really don't see why prolands with slower respawn times/quickiebomb ban couldn't be thrown in next season to replace villa or at least CONSIDERED in a cup or a vote
even with whatever flaws it has there have been so many strategies developed over the years for different midfights or flank wrap pushes or whatever, its a real shame that the map got removed due to one single season's post season poll and will now never be reconsidered (lol)