The same finishers have been used for years. I mean, when the Undertaker came back, he used the powerbomb. The stunner, or the Front neck breaker has been used for years. The Rock Bottom was a modified chokeslam. The Chokeslam has been used for years. Copying finishers isn't a new business.
Every move is a modified version of another move. There's only so many ways to hurt some one, and most people aren't creative enough to think of new ones.
Undertaker used a modified powerbomb, he'd elevate them by their tights before slamming them, considering his size, it was effective
The stunner has many variations. Not mentioning different situations (fireman's carry into stunner, argentine stunner, etc) you have the jumping cutter (rko), the regular cutter (diamond cutter), and even the testdrive/cross rhodes is a spinning cutter.
The rock bottom was NOT a chokeslam. It was a forward falling uranage. Ezekiel Jackson used the regular uranage. Booker T's book end was a kneeling uranage.
Cena's finisher is nothing more than a standing fireman's carry slam
Triple H has a pretty unique finisher, as far as I know he invented the move. CM Punk used to use a top rope version of it, but it was the same move. CM Punk also uses a shitty version of the GTS and I'm pretty sure it was originated by a japanese wrestler. Can't remember his name for the life of me, pretty sure he spells his moniker with all caps though
Sheamus does the crucifix powerbomb, nothing special about it
Still wondering why RVD's splash is so much more effective than Eddie's or any one else's. He USED to put momentum in his swing and stretch out, but he's gotten lazy with it recently....probably the pot