You can't really do something as important as a pref manager "ASAP", it needs to be done right the first time and work reliably.
It'd make more sense to fix what is causing the crashes instead of randomly re-writing systems that already exist.
The problem is RTB is old code that isn't efficient, it also chokes once you go over the old datablock limit.
I am able to start a server with RTB and $Pref::Server::AutoAdminServerOwner = 1;, and join it with no issues.
If you're having a crash I'm going to need a reproduction case or console trace or something to investigate, otherwise it's just a ghost story.
This might be another XP only issue?
Because I just tried running Blockland on my Windows 10 computer works fine with RTB, the only issue I ran into was once I went over the old datablock limit, RTB chokes and crashes Blockland while loadinhg with a buffer overrun message and its directly linked to RTB since I can go over the old datablock limit just fine without RTB.