Hal, the microseries is pretty much compatible with the current canon (aside from Anakin and Obi Wan being notified that the Chancellor’s been captured, as has been pointed out), but I don’t think it belongs in the main ‘Quality Cut’ because it’s so tonally different. By this point in The Clone Wars (and especially the way I think it needs formatting for maximum impact), everything is far darker. It’s known that the war may be fabricated, the force users are aware of a coming tragedy, the Republic’s aesthetic is swinging Imperial, and a lot of dark third parties are circling. There’s some very heavy emotional stuff for a lot of our main characters, which is about to get paid off in the absolutely magnificent finale. As much as the microseries is so much fun, by that point I feel like it’d be a very distracting change of gears - we should feel opressed and tense and concerned by this point, not entertained by that pitch-perfect Tartakovsky comedy timing.
And yeah, Yoda and R2 have a full arc together. They even go to Dagobah! I can see the issue you have with that. But again, it’s one of those things where there’s still a net value add, even though it takes away a little from elsewhere.