This wasn't an update out of the blue, the real reason is because the Devs wanted to update the anti cheat
Idk if you guys know but hackers figured out a way to access the ID panel and play as dev exclusive characters
Unfortunately ONE guy was "brave" enough to literally play as Updated Super Sonic IN FRONT of a staff member who was playing as them at the same time lol
They aren't updating the game because they care, they're literally just updating it to gatekeep even more LOL
How do I know this is true? Because if you go to a private server and try playing as a PS character you'll get auto kicked because they didn't even properly implement it! They probably just hard coded it to auto kick you if you play as anything that isn't a vanilla character without even thinking about private servers.
Hence why the update has zero bug fixes or anything, it's a low effort update, the voice lines were already put together and ready to be added, and they were only added as a "Trojan horse" so they could roll out the updated anti cheat along with it, and they knew they'd look like assholes if they really just updated the game and said "updated anti cheat"
edit: yes I know they went back on the not being allowed to record Dev stuff, that post wasn't there at the time of me writing this post lol