you've been busy Lots of interesting stuff here.
In terms of advice, I suggest you try to bring your architectural/hard edge stuff and your organic stuff closer together. When drawing hands and those shoes for instance you use round shapes only, I do this too just to roughly position masses. Once you have your general mass try to tighten it up, introduce hard edged lines, round forms don't show plane changes well and that's what I think you need, to clearly identify major planes in your organic designs. Look up some hand designs like hogarth does them, he constantly identifies those planes/angles. Reminds me I have to do some Hogarth hands, I'm dealing with the same problems