> these measures were implemented poorly and needed to be paired with matchmaking to not destroy the platform
I see these as orthogonal issues.
Your mathmaking gripe sounds legitimate, and is probably driven by Roblox's low 21+ user numbers. That would be expected to change over time. At the same time, I'm not seeing a great argument for why these folks (EDIT: Roblox) should continue to have unfettered access to kids under 14.
If communication was proactively filtered to prevent bad actors (which Roblox obviously failed to do for years), why should it matter if an adult is playing a game with a kid they don't know?
Roblox is absolutely torching their platform, in many ways besides matchmaking and the age verification. Ask any kid who's grown up with the game. Players are leaving in droves and Roblox has become quite un-cool in the last six or so months.