It all makes perfect sense to me. No plot holes whatsoever. You might not like the idea of Ahsoka and Ezra still being out there, but that doesn’t mean there’s anything wrong with it.

Ahsoka left the Jedi. She has her own path. Hera fought in the battle of Endor, but we didn’t see her in RotJ. Who’s to say Ahsoka didn’t help the Rebellion as well. She just wasn’t part of Luke’s JEDI path, since she left all that to make her own way.

I’m less interested about what Ahsoka was doing during RotJ and more interested in the search for Ezra and what happened to him. Give me that story!