I've seen a few staff members saying in this thread that the change could be overruled for obvious bad-intentioned players, and that's absolutely a good sign, but I think that what a lot of people seem to be taking issue with (myself included) is that this isn't really very well explained in the rules/update post. It simply states that subsequent bans will be 90 days and leaves it at that, with other options explained in other parts of the rules. If there was a clarification that people obviously playing with bad intentions may still be permanently banned it would ease a lot of concern that we're just going to see trolls coming back time and time again.
My initial response to this was incredibly negative, and I'm still quite concerned, but it is massively reassuring to see so many moderators stating that it can be overruled. I just hope that mods/staff aren't afraid to still issue a permanent ban when it seems appropriate. With fewer and fewer players it will only become more noticeable when those truckers you do come across are acting in bad faith.