The UHK also supports mouse keys. I own both the 60v2 and the newer UHK 80 (I was a beta tester), these keyboards are my final destination. The only reason I would consider a change is if they released an ortholinear layout.
I felt most of the extra functionality and polish that I guess makes up the massive costs of UHK and ZSA wasn't actually necessary. It was cool and fun and useful to try a bunch of different stuff, but then over time, I wanted things to be simple and small which UHK and ZSA Moonlander aren't (ZSA voyager wasn't at the time).
All I'm saying is if you've got comfortable with a cheap Corne, I think you might feel underwhelmed if you spend a lot on something a lot fancier.