The Disney seasons had problems but weren't all that bad.
SPD could have used less sidetracking in the second half and not pull Doggie's wife out of thin air.
Mystic Force could have benefitted from less focus on Nick but otherwise was pretty darn good. Solaris Knight kinda sucked but that's mostly MagiShine's fault for being the worse 6th ever.
The structure of PROO with the treasure hunt, the iMac stuff, Once a Ranger, those were all pretty sweet. However it overused explosions, needed certain characters *coughDaxcoughFluriouscough* to be more interesting AND a real two part finale.
PRJF is technically good, just not enough heart IMO. Plus the plot doesn't feel like its out of focus or something, like its not well defined enough. It also feels like the Rangers are fighting evil in a vacuum a lot of the time.