I'd agree with Nick on this one: It doesn't make sense to continuously bring back OT characters in every chance they have. Small glimpses; in the realm of cameos, make more sense than to have them constantly show up.
As far as Battlefront is concerned..they already did that with Battlefront 2? Hence why you actually got a reference out of that story mode with Operation Cinder in Mayfield's backstory. Honestly, I'd be expecting them to have Battlefront 3 (if they break the 3 curse with that series); to be set in-between The Last Jedi and Rise of Skywalker. With the year jump, there is a little bit of things they could do with the allocated time.
Back to the thread at hand...I do think Rangers of the New Republic could be a fascinating chance to show the divide between how NR officers conduct, to how Empire officers conduct. They've done so well so-far with the characterization of both sides on The Mandalorian; especially on Empire. And it'd be interesting to see how layered NR's military and diplomatic structure can be. If they can bring some of the layers that were originally going to be done for Duel of The Fates with this show; having Mayfield be potentially able to show Empire officers that there's no sense to what they're doing, I'd honestly love that.