which blond woman?
"Why are there wookiees in dresses? Isn't that a little redundant?"
it makes them feel pretty
"Why is there a ST on Kashyyyk harassing Chewie's familty?"
Why not? The Imperials are mean and their looking for hidden rebels. Takes place after Episode IV so the empire is aware Chewie is with the rebels. Makes sense to me.
"Why did they use puppets for Lumpawaroom's close-ups rather than a suit like chewie?"
CGI wasnt invented yet.

"nobody answered my questions...
Also, where is Luke, and why is Boba Fett a cartoon?"
Luke's there, he talks with them on the phone a few times and i believe is in the song at the end. Isnt he also in the cartoon segment.
and fetts a cartoon because its the obligatory random cartoon in the middle of the show. and the fett costume wasnt finished yet

hope that helps
-Darth Simon