Well here are my thoughts on this episode.
lisa in all her scenes was great... no flash news i know just wanted to mention that.
scene 1: when mouth ask her if she was thinking going back to rehab i was like WTF doesnt he have something else to ask her FIRST and she said what he wanted to hear i mean i she said no he would have been desapointed so the answer was kinda obvious.
scene 2: nothing to say about it except did you notice how alexander was looking at her? kinda checking her out and brooke was a total Bitch but its just my opinion.
scene 3: that was my fave. when millie said "but it was harder not seing him" awwwww THE BEST almost crying.... pure emotions. i still have hope and faith....
the last scene: was ok to me i knew that mouth was going to stay cause of the spoiler but did you notice how she cut to the chase and ask him right away how long he was going to stay ( both time so cute) she really wanted him to stay by her side .... i wish that scene was longer i wanted himto be blunt straight forward and ask millie if she wanted him to stay and not getting around the bush.
anyway overall it was good as you mentioned not many MM or millie scenes but at least they were in the episode right.
about the rest brooke SL no comment. alex was great. the sister SL was ok i would rather see quinn with david i dont like clay. and the Haley/taylor remarks were precious and the dinner scenes were priceless. i was LOL all way through.