Nothing is changing re. how sorcerers work currently, which you can review here: https://gdb.armageddon.org/index.php/topic,58568.0.html
However, since that update we have operated on a 'first come first serve' basis with players regularly sending requests of either concepts or just to ask 'Is there a slot?' and they are either very lucky with perfect timing or they are not. It's a bit messy and means there are good concepts that just never get a shot due to timing.
We're going to approach sorcerers the same way we do other sponsored roles and do official rolecalls that will welcome applications only when there is a slot available.
If there is no active rolecall, then you can assume there is no availability for a new sorcerer role.