Question: If she is going to continue lusting after her new BF, then how do I hint that I am making positive changes without giving her the information that she has no right to know about while in an active EA?
MY answer to this is simple...you do NOT hint at all. There is only one way to make an impact and that is to change for yourself and if it benefits your sitch then great, but NEVER changs just to prove to your W that you are better.
If the changes are positive and permanent, they will be noticed.