Would it be possible to rename the ladders per season? The way I'm thinking about it would be like how it is handled for OMs that fall off the ladder - they remain on your /rank score, but are no longer available to be played.
So it'd be something like:
UU Sum15 1600 50 10
UU Fall15 1480 24 8
UU Win15 1200 10 1 (this is the current ladder, and available to be played)
So it'd be something like:
UU Sum15 1600 50 10
UU Fall15 1480 24 8
UU Win15 1200 10 1 (this is the current ladder, and available to be played)