For me, Level-Up has areas where it's drastically better than WotC 5e, and areas where it's not (that is, better for me). Primarily that area would be the "Advanced" part of A5e. I would actually personally prefer slightly-less-advanced 5e. Something more akin to Shadow of the Weird Wizard, maybe, but slightly more-like D&D than that, if you get what I mean. Something a bit toward Shadowdark, but again, still a little closer to 5e than all the way to Shadowdark. I think I've said before, that 5e is pretty close to the maximum complexity that I'd like, but I'd like the complexity to be in very different places than it is. Certainly, I'd prefer Spellcasting to be utterly simplified. I'm barely even interested in anything over level 12 in D&D, for example.
But, you know - no one cares about what I want. And that's fine.