I think handling a QB is sort of like handling a farm league pitcher - they need to feel the heat, but you can't put the whole game on their backs too much or you might break their confidence and ruin them (something that happened to Dailey too much last year, I think).
If Beck is going to be the guy, Dailey should probably still get the starts, but Beck should get as much playing time in as possible. It might break some rhythm in the game, but it would be better for both players, and the team I think, in the long run.
Dailey gets the support by being a starter (which can be a confidence boost unto itself) and Beck gets some snaps and experiences the fast game conditions.
My $.02 for the day
IRISH!