This is just a contingency measures.... and a bad one.
1st - the issue is not only in GA. Also happens in TW....and will happen (until they fix the root cause) in all features with roster lock.
2nd - this is not a mod glitch only. This can happen with gear, level, everything that is supposed to be locked at the beginning of those features.
3rd - Ofc nobody believes that an action will be taken unless that is soooooo obvious and repeated that the bells ring on the alarmistic system (if they have one... dont know).
4th and last - if they want to stop this and they really wanna solve it, they need to take 2 steps - a) disable the squad selection until the problem is solved (this is the root cause, the backdoor to this mess) ; b) put some serious resources solving this problem since squad selection is a good option and should be available.... working properly and not as a work arround for roster lock.