McCabe is definitely a bit of a mindbender for me. Coming from Sonnia, Perdita and Justice he plays very differently. Currently I'm running him with Sidir, Luna, Hounds, Wastrels and flexing the last 12 or so points. I like the Peacekeeper for being a pain to kill and handing out slow, Death Marshals for scheming, Stalkers for condition removal and numbers, maybe Guard and a Captain, Riflemen or the Executioner idea sounds wonderfully fiendish.
I tried him first time last night against a Leveticus crew. We had Reconnoiter, Assassinate, Line in the Sand, Breakthrough, Outflank and something else I forget. I picked Outflank and Line and pretty much deployed centrally to see where I needed to commit. First time using the Hounds too, and I overextended them to the point where Levi is farming Abominations off of them and taking a flank away. I really liked how McCabe's passing works, but I made a bunch of errors going for damage over scehemes and fighting over the center and denying myself Recon points. I'm going to keep trying him, but it's very different from what I'm used to.