That is a great execution of the entry, but this is also how we do it in our dojo. Isn't it still a frontal interior entry? When he enters he is still in the front arc of uke, and then he ducks out back. I'm looking for the entry that position you outside of the attacking arm and to the side and back of uke, not in the front arc of uke's body.
Why not simply do an irimi motion , taking you behind your partner, after the initial movement which if done correctly neutralises your partners attack?Cheers, Joe.