I think that Ki Aikido gets a bad wrap because people come across clowns that tout great ki and perform with mystic like abilities with their own students but cannot do the same with others.
I agree completely with this; I can recall being instructed to fall at a certain stage of a technique when I first started Ki Aikido and it certainly led to me believing that my technique was better than it was.
This doesn't happen in the association I moved to. I needed to drop down from 3rd kyu back to 6th kyu and re-learn the syllabus from scratch when I changed association as I just couldn't perform techniques whenever any resistance was applied.
Thankfully not all Ki Aikido is the same in terms of how it is practised.