Maybe are you not aware loop regions now also have transition timelines ; it will work as well and will probably be more intuitive for most people to use loop regions than transitions/markers.
There used to be an issue with loop regions in a particular case where the tail wouldn’t play, which I describe in that thread. That’s why I ended up doing as you, looping with transitions instead of loops, in this music: FMOD adaptive music with unlocking loops - YouTube
But as I just tested, this issue seems to have been fixed (in 2.02.03).