I also think his finisher sucks. So does Ambrose's. Both seem too dull to use as finishers. I agree the kiss of death is a cool touch, though.
I don't like little guys, such as Christian using the spear as a finisher. You telling me Christian or even Reigns is gonna finish Kane, Henry, Show, Lesnar, Ryback or Langton to name a few with a spear? Don't buy it.