I agree that quick access to low, memorized, and high modes from off is great and IMO necessary for a good UI. This UI has those, but not being able to switch modes while on is just different. It’s not necessarily bad, but it’s so different from my other lights that it would probably dissuade me from buying it.
I felt the same way about the skilhunt H03 UI. Single clicks while on changed modes and a long click turned off. This was different enough that I just didn’t want to deal with the potential confusion when switching between lights.
Luckily there are great FWs that the community has developed and resources to learn how to flash them to your drivers. For me the golden standard for UI is: access to low, high, and memory from off, and the ability to go up and down in brightness. Toykeeper’s clicky and e-switch ramping FWs, as well as Narsil, allow this.