Is there a reason not to train in just socks? Most gyms won't allow it because closed footwear is less of an OHS issue than no footwear, but this gym allows it. I don't do it on most lifts, but I get the most friction between my feet and the slab underneath me with just my socks on. If you look carefully, my toes are pointed in -- I deliberately turn them in for rows and then push my knees out, and need a lot of friction between my feet and the floor to make that work. It's all about getting tight in the right places. If I don't do that, my lower body isn't tight enough, and consequently doesn't support my torso properly, resulting in my lower back being the most worked part.
Thanks, I had some trouble with depth when I first got these shoes, but I've gotten more used to where my body needs to be. More tightness wouldn't go astray, though.