20% heavier wheels is like 2 or 3 pounds. For tall riders that is absolutely negligible. It's a small market, and maybe too small to be viable, but if short people have 24", 26", and 27.5" wheel options, I don't see the harm in letting people over 6'4" have an additional choice. I'm 6'7" and people are constantly asking me...
Heard about an updated transition spur recently, similar design language as the new sentinel, still has a flex stay and seems to be 120/120. No word on release date.