Airjitzu being written out of the show could've been done better (rewrite)

So most of us probably remember the drama back during season 8 when we found out the ninja seemingly forgot how to do Airjitzu. There was no acknowledgement of the change in the show, but the creators confirmed on Twitter at the time that the decision was made to limit the Ninja's power level. Tommy's short story Way of the Departed suggests that the technique was tied to dark magic and the ninja stopped for that reason, and nowadays, Doc Wyatt just says they don't practice the form anymore....