Maybe it's working as designed, not sure, but when I apply this mod, I get all of my apps in the MultiWindow bar, but once I move them off the bar I cannot put them back on it. When I grab a certain icon and drag it to the bar, a completely random app is moved to the bar instead of the one I dragged. This didn't happen to me with the LJC version of the mod.
I encountered this because I don't like having all the apps on the MultiWindow bar but like having more than what comes with the stock feature.
Running T3's stock rooted deodexed MA7 ROM with everything (including the mod) flashed with TWRP. Tried reflashing 3x so far, wiping cache and dalvik each time.