After tonight's class Kevin's post makes a ton of sense. We worked on Ikkyo all night. Got lucky and wound up with a semi private class so we really got to explore it.
I tried not grabbing. In fact not raising my arms at all for the Shomenuchi and Yokomenuch attacks until Uke had fully extend himself in his attack. Ikkyo worked much much better than it ever has for me. Also really concentrate on finding that spiral through Ukes body rather then concentrating on the linear direction you eventually want him to go in....
Lots of food for thought and this thread was on my mind as we trained.