using the body to control uke

OK, after grilling through notes I am starting to see some sort of trends in the ways tori controls uke.

1. using tori's body to directly control uke
In some group of techniques I see it's integral for tori's body to control uke (i.e. hip, hand, arm, etc)by being properly positioned/directly attached.(Like nikkyu, sankyu, hip throws)

But there are other groups of techniques where you can't control uke well with your own body directly by pinning uke's attack against you (like kotogaeshi on a knife attack or katana nage on fwd punch)

2. using tori's center space in front of body to control uke
Then in some techniques we focus on keeping the work not directly attached to tori's body but in a space centered and in front of tori's body. (like kotogaeshi, ikkyu, etc)

And in fact by putting uke directly against tori's body it actually lowers quality of technique. (like if you try kotogaeshi on a fwd knife strike with attack pinned to body tori cuts self.)

And if you work too far away from this area you lose control on the attack.
3. getting out of way
And then all the basic footwork puts tori's body in a position where any number of techniques can come into play to control or act on uke. I am wondering if techniques will come out more easily once i get used to getting out of the way (with multiples and freestyle and such)