Yep, Easter will have given people four bids under JSS, most will be some way up the learning curve and an overall picture of senority vs. rosters will be emerging.
It is only then that we will have a handle on how much control the new system makes it possible for individuals to really have vs. how many are going to be on blindlines in all but name due to the consequences of Global Constraints/crew repair and the unlocking of rosters.
TBH I’m sceptical as to how much significant tweaking BALPA will be able to do once JSS is in place, so it’s a case of fingers crossed.