I definitely know what kuzushi is, I just can't generate it on more than a few throws with any consistency. I think one reason uchi mata has always been hard for me despite my love for it is that I've never developed a real feel for where I want uke's balance to be to pull it off.
Osoto gari I can feel it, I make you take a step forward and you resist leaving your weight slightly back, and then I enter and pull you down and back to emphasize that and you can't get your feet under you and I just have to reap and drive to finish. Tomoe nage I can feel it, I get my grips and starting moving forward and to the side, and as I pull you I get your center of gravity slightly forward over your hips and I slide under to throw.
For ashi waza, I get you to take a step and as you commit your balance to your stepping foot I sweep it out from under you, when I'm on I really feel the weight start to transfer and can pretty consistently catch you. I can sometimes feel the center of gravity out of place for sasae and ouchi, but I've never found a big forward throw where I can really feel it. I pretty much just get you moving and pull like hell, which is why I think neither uchi mata nor seio nage have ever worked well for me with any consistency despite years of practice.