UP for me.

One beef... no credit at all for "R" tickets. As it happens, CO is not on my employer's approved carrier list. Only way I can go CO is if the fare is significantly lower. "R" (and sometimes "Z") takes care of this. For March TATL travel which I'm booking next week, it'd be "R". "Y" or "H" would get mileathon credit, but not an "upgrade" to "R".

Not sure if this was true for past Mileathons as I haven't been targeted since "R" became a relevant fare class (also, changed jobs).