I know I said basically this exact same thing yesterday but.... depressing as he is, Allardyce is a pretty reasonable choice.
Tactics: He'll give us defensive structure, improve our attacking set pieces, and he doesn't require good passers in midfield (which is perfect because we don't have any).
Transfers: He's worked closely with Walsh and Glover before so we should be able to target our problem areas pretty efficiently when the January window opens. And if you're worried about exactly who he's going to sign, keep in mind that in his last three managerial stints, he's mostly targeted players ages 24-26 (a.k.a. early-to-mid prime players, a.k.a the gaping hole in our squad). That's a sound strategy for us right now.