I liked Sheen back when he was acting. TAHM was good too, until the whole thing started having life imitate art, that and the show going nowhere, outstaying it's welcome. The show lost it's edge after Melanie Lynskey (Rose) stop appearing regularly back in 2006.
Hopefully this will open the slot for fresher, better comedies like Community and Archer even though the show isn't ending. For Charlie, besides now having more money than sense, I hope he cleans up some and go back to what made him a classic in a the first place and do some acting.