The very reason Klinklang, Carracosta, and Crustle have an OU analysis is because they have the new super moves, Gear Shift and Shell Smash. They were allowed an analysis way before it was known that they weren't very good Pokemon.
Now that it is known that they aren't good Pokemon, there really isn't any reason to give them even an UU analysis. Have you tried using Klinklang in UU? It's absolutely terrible. It gets walled by including, but definitely not limited to, Registeel, Arcanine, Empoleon, Cobalion, Dusclops, Chansey, Zapdos, Rotom-H, Deo-D, and Dusknoir. Now, if and when it gets Wild Charge, then maybe we'll talk. But for now it doesn't, so it won't get an analysis.
As for Carracosta and Crustle, they are probably the worst Shell Smashers other than Magcargo and Torkoal. Not getting Baton Pass is a HUGE deal. And the reason why I don't have Carracosta is because it is almost entirely outclassed by Kabutops. Sure, being able to go mixed sounds like a good argument, but then you gotta realize that if you invest anything in both attack and special attack, you leave Carracosta freaking slow as hell. Even after a Smash, it's still gonna get outsped by a large portion of the tier, and Aqua Jet isn't really going to save it. Crustle I have the same kind of argument.
Now, if you could provide logs to show that Carracosta and Crustle are worth having UU analyses for, then maybe I'll reconsider. But until then, they're staying on the list.
Klinklang though is never getting an UU analysis, I don't give two shits that it has an OU one.