Personally, I'm waiting until the books are released next year before forming an opinion on them.
I’m OK with slightly altered versions of classes, races etc, from a world building perspective it just gives you more options to play with. If you want to differentiate a race from an isolated region, use the 2014 rules, but more commonly the race will use the 2024 rules.
All the talk of mixing rule sets reminds me of a guy at work who has a TTRPG group that I often ask about his games and how they’re going. He once said one of the guys in his group was running a game where he had everyone play an elf from a different game system, so one player would be a D&D elf, another from Shadowrun, one from GURPs, etc… It still hurts my head just thinking about it.