Just an update for awareness. 14316 does break compatibility with the 10586 files as I thought it might. I have an ISO with Server 16 TP5, but no dang clue how to extract features as cabs, so I'm unable to test whether that is compatible(id imagine it's likely).
IMHO, it isn't worth to waste the time to make the pack for Beta builds. In fact Beta builds are now so frequent, that it is also not worth to upgrade them each week.