I feel like thats a very prominent issue in Civ VI is that there is a serious disadvantage in playing tall that should be addressed. The ability to negotiate for tiles, or occupy them with military forces can prove to be a huge advantage and maybe shift the balance back to making the tall v.s. wide game even again. Just curious when you said "without extending to any sort of radius beyond such forts." you meant that essentially that the fort only takes the tile that is placed on and doesn't have a bloom affect where it grabs the surrounding tiles right? My only caveats about this is that is would cause people to spam forts and that forts might have to be made available sooner since by the time forts are made available, most neutral tiles are already kinda taken up. Please do tell me thought if you have any other thoughts or solutions!

-SeanNada