Yep. The PG folk are banking on fevi generics in 2020. What's worrisome is hair growth has not been noted in the fevi (or other CRTh2 antagonist) trials as a side effect.
I think PGD2 is meant for maintenance only, no regrowth. If fevi even fails to maintain, then we can logically and safely dump the whole PGD2 theory into the dust bin.