My point is, once a correct cruise climb pitch is set, of all the modes, pitch is least likely to get you into trouble due to inattention, diminishing thrust or airmass vagaries, and also avoids the phugoid pitching of FLC. VS is a highly divergent mode in the climb. I do agree though - Airbus and Boeing both manage to produce FLCH/VNAV modes which are nice and steady, so why can't we have the same?