although you say "something new and different" it basically sound really overpowered.
Imagine the Kage Bunshin to have your HP =) then you'd be unstoppable.
If you have even one who takes the hits, you'll win most pvps.
Numbers are a decisive factor.
Also, I *do* believe the KG currently ARE quite unique. Having a Sharingan that has 2 stages with different techniques, the Hachimon where you build up destructive power, the Hyuuga where you don't need any kind weapon to attack .... well, I think that's quite something.
You have also not told in which "category" you want to place this, so I have to assume you make a new one.
Then somebody can have hachimon-sharingan-rinnegan...and believe me. then he kicks any forest butt, is the pvp champ and well.... no fun to play against
I also would like (in any case) to wait and see these "boss kekkei genkai" (that's what it is) more in detail, they have not even reached the anime really.
Also mind that there are no Orochimaru techniques here, and the entire Character is much better explained. I wonder why nobody wanted to just "generate a new body" using the old one to deform and attack