I'm not convinced that you can have aiki and not have done the jujutsu work first.
I think that people have to train enough jujutsu to udnerstand when they are confronted by something that's just different. Does not fit in the pardigm.
I don't think that most people hwo have not done the jujutsu get it.
Not to disagree, but what about those whose start out by training for the body skills first, without formal jujustu technique? If I recall, some contend this is not only possible, but a better route to take.
(This does not describe my own practice or history BTW.)