What edition do you think had killing monsters are the only RAW way to gain xp? I'm pretty sure that's like "orcs are always evil" in that it's literally never been a thing.
On topic, though, no I'm not planning to use the new rules. Given how WotC has been acting, I'm strongly disinclined to give them any of my money. Unless and until something pretty significant happens over there, I strongly suspect that I'll be bowing out here. Maybe if they were doing something really exciting with the rules, I'd consider it, but everything I've seen so far has been basically "slightly different 5e." Which, to their credit, they aren't advertising it as something new and different, so at least there's that.