This has been discussed on and off for a few months now, amongst CLC, between members of CLC and GHC Steering/Haskell.org, Tweag, Target, IOHK, Serokell, etc. My only regret is that a lot of the conversation happened privately.
> All libraries process needs to start on the libraries mailing list
Not anymore.
The libraries mailing list has proven to be ineffective when it comes to getting stuff done. Mailing lists are not the right format for this. Furthermore, I don't see how emails are more conducive to deep discussion than github comments. There are many GitHub issue trackers and PRs which show otherwise.
This new process will never be perfect and of course will need some tweaking, but the current process is very poor and gets little done. Most proposals I ever see end up with no resolution.
Since the GHC Proposals process has proven to be a net positive, much of the structure was taken from there and adapted to core libraries.