And you know, there are 2-2-2 PMUA configs (like the 767

)
I feel more comfortable in the PMUA seats as long as they're sufficiently wide. If I was on a 777/747, I just booked a 2 seat.
Can't lose on the 767. Easily the best of the PMUA C IMO. Didn't used to be that way though.
PMCO seats weren't as comfortable IMO. They were sufficiently wide and long, but they weren't particularly comfortable. I slept most of the way on a EWR-NRT flight, but my back was sore almost the whole time. That's never happened to me a on a PMUA seat ... even with the old C.
I'm doing IAH-AMS in July in PMCO C. I'll be curious to see if my experience is still the same.
PMCO food is definitely a good bit better.
As always, YMMV.