Blitz and Logistics should not be in the same conversation. Logistics units can generally fire away willy-nilly, Blitz units have to worry about terrain, movement, ZoC, their own health...it's a much more situational promotion.
And does Logistics need nerfing? It's very strong, yeah, but that's balanced by being a very high-level promotion, on units that level very slowly, on a promotion tree that's generally less desirable than it's counterpart. Ranged naval units are the only exception, which I guess is why most of this poll is about them, but the promotion itself is fine as-is.