I transfer mine to jars, but not in any hurry. I actually like them to "air out" for a week or two after opening.
For flakes or cakes I smoke alot, like almost daily, I rub em out or grins them to a ready rub to save drying and packing time.
For the more "special occasion" flakes or ones I smoke less frequently, I like to leave them intact. There's also some I leave intact because i Like folding them, but that's not many- as I rub almost all my flakes.
But if it's in a jar, I don't think it matters either way if it's in Flake form or rubbed out. It's going to retain moisture content and age the same I'd imagine. I'd say it just all depends on your preference