I think you can still get seasons if you pay attention and buy immediately when they get offered to the public. They allowed ST holders to request more during renewals that end today so I'd pay attention should be soon.
Youd just be paying the same donation for row 16 sidecourt upper level as someone who has had their seats forever pays for row 3.
With the new donation set up I would think that some people will have a chance to add seats.