Big Things Ivy can punish meterless:
3B, 66A, 22B, WS B/K
She has option selects that beat both 8b+k SW transition and 66B SW. Her mid range game (the same area that aeon is good at) is rough for him because of 214B (he can't punish it at -14 + range, he can only preempt it with 66a, which Ivy can punish) and 214B/8B is just a really irritating wall that's really difficult for him to push past. On the plus side for aeon, even though she punishes more stuff, it's little damage on things that aeon normally gets destroyed for (like 1K) versus other characters, since Ivy lacks a really heavy punisher at slower frames without meter. (for example, her big i16 punisher requires both meter and blocking while standing)
in general, she kind of plays the same range game better then you, better throws, keeps you out, ignores a lot of your evasive moves with her own safer evasive moves, and she punishes a lot more of your tools then other characters. I don't think she has a better gauge game then you though (not sure off the top of my head honestly...) and she dosen't kill you for attempting a slow low. You also generally hit harder then her, with the exception of dat CH 3B she has.
I don't know anything about NM. We don't have one locally and every online NM is a scrub. :( Give your thoughts on whhhhyyy so i don't get owned if i ever fight a real NM.