I would say to put the Ahsoka/Plo flashback scene at the end of her first TOTJ episode. I remember when I learned the first episode would be Ahsoka’s homeworld, I thought “oh Filoni is obviously going to show his favorite Jedi Plo Koon discovering his pride and joy Ahsoka in that” and it just doesn’t have mention of him at all.
Anyways, all that to say I do think that scene should be plucked out and used, but I’d vote for it to be inserted chronologically.