If you want you can justify Kakashi's BS mangekyou sharingan taking longer to hit diedara then it did to move the explosion. My guess is he had a hard time with diedara was because he was a moving target in perpetual motion. While the giant suicide explosion was a stationary object.

Yeah agree with the rest of you in that Diedara fighting off team guy with his mouth kunai was extremely badass and probably the best part of the episode. God I hope they move things along to the next shipuuden arc because the episode titles seem like they're going to try and drag this out some more.

Sigh. I don't know if you guys are feeling really disheartened, best I can say is watch episode 26 again. Gives some hope for the future.