I really like my Wall Playset, but there are two knocks against it for using it as a Star Wars display:
1--The foot pegs are too large for modern SW figures. this wouldn't be as big of an issue if the ground had any kind of flat spots, but it is all smooth rolling mounds that entice unpegged figures to fall down. I didn't try any of the vintage Kenner figures, but they may fit the pegs. More importantly,
2--the playset is designed with the wooden platform at the top as an integral part. Without it you have a big weird hole in the top of the display. I have thought about coming up with something Hoth-ish to cover the hole, but the inspiration has never hit.
Tyrion is the only figure I own now, but I would like to go back and get some of the Crows and Free Folk to display on there. Pity the themed nature of the release and the paint-app issues killed the line after one wave.