Levistus's_Leviathan
5e Freelancer
I don't have Level Up.I mean I dont know if you have Level Up @Levistus's_Leviathan but I got it day 1, and if its 'compatible with 5e' its 'compatible with 3pp for 5e' and I just cracked it open to look again, and yep there's the rules in there as a complete game.
I dont think one would even need 5e Core. So....
That to me, is actually starting to look like the real issue here, hate to say it.
And, as I said in the OP, if you'd already moved past 5e, good for you. But if you're boycotting WotC eternally because of the OGL 1.1 without giving them a chance to "make up", then you're not helping solve the problem and are potentially making it worse.