It's true, but personally in K2 I didn't bother to find Revan and I wasn't thinking of him. So I think the same would be done in K3. We may decide if they were LS/DS but we'll have a new character anyway.
You right... GL probably wanted to rush this end episode. He just put in some good fight scenes so the people could forget the other subjects. And he also made all the Clones kill the Jedi to just finish it of as Ghostofanakin said.
I hope... in the future... if SW will still exist, the movies will be based on a different era.
I think as introduction we could go to either Sheleyron or Katarr, since we never visited them.
Then Corellia. Then the three options: Dathomir, Ilum and Coruscant.
Then M4-78. Then other two options: Unknown World and Yavin 4.
Finally Ziost.
Remeber the Mandalorian clan on Dxun was re-organized by Canderous Ordo, so probably they became more civilized and more intelligent. I think the Mandalorians in K1 were just rebels or were part of another faction.
I agree on all planets that Terranova stated, but I would add Ziost as final planet and Dantooine again, just to see how the Lost Jedi are doing rebuilding the Jedi Order and the Academy.