I'm disappointed to see that C+ has only a 34" pitch on DL's 339s. At the stage lengths this aircraft will fly, and the price difference they'll likely want, three inches of extra pitch is crappy.
C+ is, as far as I can tell, pitched at 35" on all other long haul twin aisle aircraft in DLs fleet. Even the 75S (w/ D1) is at 35" v. 34 for the domestic 757s (and other single aisle aircraft). 34" is acceptable for three or four hours - and the domestic C+ doesn't have the increased recline (ie knee tightness and angle of IFE isn't as big an issue).
C+ is gonna feel squeezed. Poorly done, Delta.