My $.02: sure, a WBC seat may be priced 12 times higher than a coach seat, but I wouldn't value the experience as 12 times better, per se.

My thinking on using miles for coach vs. F is if it would be better for me alone to enjoy a good meal and a wide seat to Athens, or if it would be better for myself and my best friend to enjoy so-so meals and seats-- but for my friend to also enjoy the Athens experience-- for the same price.