brent My question for you is 'how is it now?'
I think you'll be impressed. I could use it as a daily driver, except that I haven't been able to get it to work with a Bluetooth keyboard (allthough it likes my Bluetooth mouse -- go figure). I prefer the way Plasma handles system settings to the way Xfce handles them, but that's just a matter of familiarity. And if anything, Xfce is even more lively and responsive than Plasma, which is more lively and responsive than Budgie is. (Subjective, I know of course. I haven't quantified those impressions with real benchmarks, which can get complicated.)
What I'm saying is, if you try the Xfce that Solus is offering these days, you won't regret taking a look at it. Not saying you'll want to replace your beloved Budgie with it, any more than I'd want to replace my beloved Plasma with it, but it will probably change your impression of Xfce. And it beats the crap out of the MATE it replaced.