OOO's finisher that doesn't really use all three Medals' power.
What's the point of using that Medal if you didn't use the power?
ShaUTa's finisher for example, you could have used any other head Medal and you would still be able to use the same finisher, as the finisher only requires Unagi's electric whip and Tako's tentacle drill kick. What they should have done, is adding a supersonic wave attack using the Shachi head prior to capturing the opponent using the whip. The supersonic wave attack can force them to become not focused on the battle (as they becomes focused on blocking the sonic attack by covering their ears), thus making them easier to capture.
Another example, TaToBa's finisher. It doesn't use the Tora claws at all, it basically only use Taka head's pinpoint ability and Batta legs' kicking attack, and I'm not even sure about the Taka head part. He should have used the Tora claws to perform some kind of energy claw slashing attack prior to jumping, in order to weaken the foe, thus preventing them from escaping.