I applaud the reduction in the scaled melee power tied to core EDs and Epic Levels, however 175 is too much for blitz. As it stands right now, that is a buff from live blitz since melee power affects more than just base damage. Furthermore, you have suggested that you will loosen the constraints on blitzing, thereby cementing it even more so as the ED for non-casters.
I propose that if blitz will no longer require kills to sustain that around 100 MP (10/stack) may be a better number. IMO, crusader, fury, and dreadnaught should all be very viable choices for DPS oriented (do not read as maz) toons.