Unfortunately things seem to move at such a pace that almost everyone requires trunk/main these days
The question would be if it would be possible to make a release of the newest RTL and FCL packages without a new release of the Compiler. The Compiler featuresay not be stable yet, but the updates to FCL and RTL probably are on a much better track
This is essentially the case for 3.2.4. Many/most of the additions/changes for RTL and packages were merged there except those that rely on new compiler features or were too much manual merging would have been necessary.
Any other approach will not work as it would be too much maintenance effort on our end.