To be fair, this from two developers I've been in contact with over the years who regard the release candidate as Beta and the OS not truly functional until several incremental updates.
1. Apple has been known to make last minute changes to the OS, Mavericks being an example. Many developers wait until the OS is released before starting updates.
2. Incremental updates... say OSX.11 --> OSX 11.2 can break updates that were developed for OSX.11.
Apple has been releasing a new operating system almost yearly (it helps sell hardware/computers). The past four or five OS upgrades have caused various problems for both software and hardware manufacturers and that includes Logic-Pro so it's not all third party software that has problems.
Welcome to the OSX Beta test team! 😉