I'm not sure if this is a "funny" type of post with the responses and everything, but let's put this discussion to rest once and for all:
Removal of maps is not tied to COOP nor the developers of COOP - maps get removed cause they're old, unbalanced and/or just plain suck for deployment.
If you want these maps in the game go ahead and download, then open your BF2 editor and start reworking and balancing them - but for now the focus of the devs working on maps is better utilized elsewhere - which is something they themselves have said, you can read about it in the official PR Discord server. So what if they don't have the time to give the maps the love they deserve, surely we can keep these maps for coop and not remove them entirely?
Well no, and don't call me Shirley. The emphasis of PR is not on coop, we barely reach 40 people active daily on the server, and with other servers combined, probably less than a hundred daily:
For comparison here's deployment with (usually 1 always active server like HOG or SSG):
So the question is why should the devs utilize their effort and limited time in fixing maps for a game-mode which doesn't see as much consumption as the game-mode they constantly work on? The maps hinder gameplay from their perspective if set, and take up valuable space that could be used for other, more modern maps. These devs are not Zeee or melon, I know Unicode was working on Jabal and you can go ask wherever (PR related) you'd like about this info.
TL;DR: Devs have already said that the maps need balancing and reworking, which costs time, which they would rather spend improving the game elsewhere. These devs are not melon or Zeee afaik (who make pretty awesome coop layers for us and listen to our feedback (not always as most of us complain without any reason anyway)), and if you want these maps back go learn to edit/make maps and consult with the devs in charge of mapping on what should be fixed. This tl;dr has turned into it's own passage so: TL;DR: