Hi these are just some suggestions to razer for some cool stuff to do for a DeathAdder 2016.
Add the side lighting like the mamba.(probably not - would probably stop mamba being good)
Add weighting.
Add a chroma screen for a customizable Chroma panel.
More customizable.
Be able to order a custom mouse with extra macro keys etc, to suit what you want.
Wireless and wired like Orochi.
Custom paint jobs if ordered from razer.
A front grill like nagas.
Less rubber (tends to make me sweaty)