They keep sticking this plane on RDU - ATL which is quite annoying when in Y/C+ (especially because this is an elite heavy route). That said I did get lucky a few weeks ago and my RUC cleared for this leg (ATL - SFO had previously cleared at booking) and the F seat was very nice.
But since I rarely am sitting in F on RDU - ATL, I can't wait for this plane to disappear entirely -- there was as time when we got more 757s and A321s on RDU - ATL and I certainly miss those days