Spidertron? Nah, they're mere Insectitrons. Early-Mid Tier Spidertrons for all your spider needs.
Mods introducing new content into the game.
Transportation of the player, be it vehicles or teleporters.
New ways to deal with enemies, be it attack or defense.
I think you should give some of your spiders trash slots. This would also unlock their logistic slots.
I'll think about this suggestion.