FC upgrades are so pointless now, I actually decline them on OLCI when I probably have a good chance of getting BF upgrade if I have Row 5 on the Airbus or the exit row on the DC-9 in the mornings. Give me 5A/5F and I'll be out like a rock with more legroom than the folks in F.
In the p.m., the only advantage of F is the free drinks. Depending on how the week is going, I may need them.