Will there be some of even symbolic "we are sorry" statement? From what I have seen in private leagues, people try to break their necks off trying to keep everything on schedule. In champions ladder it is clear not everybody is affected equally. Some people are "bluescreen hunting" while others have crashrates >90 %. Given PS4 cladder is not huge, you could easily make a histogram of people's crashrates to realize this problem isn't random. Not to mention this hurts anybody seriously interested in champions ladder competition as you pull the rug away from anybody still with very good chances of qualification. Especially given those are the last days of champions ladder and given you knew about the problems and were able to reproduce them internally. Unlike some others, I do not expect you to work on weekends, but given problems popped up early friday/late thursday, a rollback could have been the evry least you could do.
I can't even imagine how this could have gotten through testing. If game crashes even in singleplayer, it is quite clear there was some serious negligence in testing the game on PS4. As majority bluescreens happen even before match starts and both players crash (all of bluescreens this way in my personal case), I see no way this should have gotten past netcode testing, too.
After all those great Legendary Edition news this was totally spectacular way to drop the ball. Fix this when you will, just show some understanding you seriously hurt the community with this. Given this is an update focused on selling 2 more DLC to us, at least giving one or two old ones could be some show of solidarity. It wouldn't even cost that much as new people would still most likely buy eventual "season pass" of DLC races and old people most likely bought them anyways.