Aside from one or two random posters (like the poster above you), you will NEVER see Jiko on a "worst" list. Kona, too... but definitely not Jiko.
But O'hana is king of that best/worst thing.
In our opinion, Jiko is the least impressive signature restaurant at WDW. We also think it's the most overrated restaurant on property. We've had better meals at non-signatures.
1900 Park Fare
Mama Melrose
Chef Mickeys
CRT dinner
Trails End
From the restaurants we've eaten at in the last decade, it would definitely make our worst list. Value does play a factor. We expected much more for the price, & we're used to eating at a signature restaurant nightly while at WDW. We've only eaten at a very few non-signature restaurants for breakfast or lunch that we would consider worse.but is it on your "worst" list?