You're not the only one: the last fifteen or twenty minutes of Into the Fire are pretty awful. (And, lest you get your hopes up too far, Sheridan continues to be OTT at fairly regular intervals.)

But I think most of the rest of season four is really worth it; there's a lot of good there, and a lot of fun stuff, and a lot of G'Kar and Londo and Ivanova being awesome. (This is a B5 heresy, but I've always felt that the last episode of season four is pretty embarrassing, and since it's not arc-related it's totally skipable.)