Splendid! Loving your USA port project so far. Have you figured out how the Maxim's supers work? In fact I remembered, in the past I have gathered several alternate sets of JPN Revenge of the Findesiecle ROM from somewhere (modified by unknown Chinese authors), in which Maxim has two super moves (but uses Julius' Hydro Storm and Grand Cross instead of Maxim's original supers) but I cannot share here because I don't want to violet against general forum rules, but maybe they could help you a bit to make Maxim possible to regain his orginal supers, if you need them reply and PM me, then I'll PM you back soon.
Speaking of Simon, I don't know if there's possibility to modify Original Simon's jump height in order to make Original Simon's campaign possible to beat. Such alternate set I mentioned just eliminate Original Simon's campaign altogether to avoid this problem, but it was an unpopular decision in my view.