I think you're right about Thalia, and she's probably even more important than SFM. I'd cut like utility guys (2nd Pridemage, Scryb Ranger) and a sword to get her in there.

Did you ever have lethal damage trouble? Taiga+Wolf Run is the costliest part of my deck, design-space wise, but I wasn't comfortable cutting and losing wins in the many situations it beats. As above, I do think Mom gives a leg up on beating things like TNN, but it still seems iffy, even against (e.g.) a DRS out of Elves. (There is, obviously, the major difference of Maverick's ability to push through other damage more reliably.)