So if you did not know all Alliances are doomed for now to be removed forever after season end which mean you won't play with friends that you made trough journey of playing this game.
What system i suggest for developers: in my opinion they should be check if any alliance have more than 30 active members at the end of season. When Alliance pass it should be in next with same members.
If Alliance does not met criteria should be disbanded(I am sure not only my server have several inactive alliances that should go away)
If you have better suggestion what developer should do with alliances post here