These are the kind of episodes that make you appreciate the really good days. The show was in a transition phase right now and was really searching for its identity, trying to figure out how to use the supporting cast and how much is overkill. Thankfully they realized that Berta and Judith's roles should be diminished and that Evelyn should appear in just about every episode.
Two and a Half Men has also deemphasized guest appearances and put the spotlight back on the main cast. For some shows that doesn't work, but for 2.5 Men, we can listen to Charlie and Alan bicker for 9 seasons with no complaints.
The episode had its moments, but I would hardly call it stellar.