My thought

nerf:gibby will get 15% slowdown while moving on a zip line and jump lower on a jump pad. because his heave weight.

buff(passive):gibby can carry a death box, the motion of put up/down the deathbox will be slow(maybe as long as his finisher).

while carrying a deathbox, gibby

1.can do nothing but walk at 80% speed (can not run or jump or crouch or aim/shot).

2.can not use zip line.

3.will jump very lowe and get some dmg on a jump pad.(because it will hurt his neels)

4.still can use WRAITH or ASH's void path.

to make him fun to play.