Can't do T.Allen over House, and absolutely can't do Williams over Wallace. You can't play Williams because he just isn't good. But with Allen, its a little more complicated.
You need House's shooting on that second unit, and with Daniels back, it will allow House to play more off the ball, and make him more effective. What they should be doing, providing Allen continues to play effectively, is using Daniels, Allen, and House, allowing Rondo, Pierce, and Ray to get more rest. The rotation will be tightened in the playoffs, and I think other than Wallace and Daniels, other guys will be moved in and out based on matchups and situations, but for the rest of the regular season, using a full 5 man bench (maybe not at the same time, but use them all) would be beneficial to this team.