Please please please ANet! Can you make this a year-end gift to us engineers? I’d go with #2~!! This would bring a lot of joy for all engineers!
I’d imagine it like the kits would somehow depend on the primary weapon at hand. Example: If I were to equip Predator on my engineer, the kits would as well have the same “theme”. A grenade kit would look like it has a giant skull as the backpack breathing flames. Flamethrower kit would have steam exhausts. And the list continues. . .