Many see that concentrating on the "priorities" of fighting to be counterproductive to the development of the mind, body, and spirit connection in aikido.
So, it is not so much that WHAT is studied in aikido is not effective...it is more about the HOW it is studied. You have to put the emphasis on the HOW...not the WHAT. that is the big thing that many fail to realize...and hence the THOUSANDS of post of debate and the dissonance that is experienced by many.
Once again, gotta go with Leavitt.
1st order change is about the content, what.
2nd order change is about the process, how.
3rd order change is about the identity, who.
IMHO, Aikido is only a tool and an opportunity to develop what you intend it to develop.