I just decided to check my flights before this happens. It so happens I have used a GPU for a TPA-IAD-Dub-EWR-TPA trip in October. The two trans Altantic segments cleared, but not the domestic. I just checked and there was now an R seat on the EWR-TPA segment. A quick call to the 1K desk and 5 clicks of his mouse and I was in F.

The question is why did I not clear automatically. Not to have this functionality IS a big deal.