2nd to 3rd gen questions

so for anyone switching from a 2nd gen to 3rd i am wanting to see what mods/upgrades can be swapped or for those wanting something for the 3rd that isnt out yet what can be bought.
i will try to keep this updated with any information i find out but if anyone has something they want checked or has tried let me know and ill post if it is or isn't

ill start off anyone know if
ome leafs or bilstein 5100s for the front and rear.

what about side steps (same bolt setup?)

also is the area behind the seats comparable in size. i have a sub box behind my seats now that i would like to just be able to switch over.

 

anything??

 

i saw that thread it answers the question about the shocks but im more concerned with the leafs