Re: tl;dr 2 of 2
personally if Diana's going to be about order an hierarchy why not put her at the head of a hierarchy forming an order of her choosing.
Bruce and Clark have done all those things you said, but none of the people you mention function as their version of Charles Xavier, or Niles Caulder or...Zordon of Eltar. Hell, just seeing those versions of the SUperman mythos where Clark has a functioning Jor-El AI to ask questions, never mind taking orders from, seems very wrong. They're above that. And Diana should be above that as well.