Hi Skypointer !
IŽm not going to (again) start replying to everything in your post. There are enough threads on PPRuNe already about that !
WeŽll see what happens next. Aeropers has bet on one horse (SAir Group seniority, with no compromises) and it now appears that this horse is losing while the downsizing begins and the Court of Abitration will produce a verdict before the end of the month.
Maybe some "seniority specialist" can remind Skypointer what happens to a seniority number when you join another company.