I know I made the riimoved joke, but I've been thinking about this for a while and it makes a lot of sense to me.
I think sprinkler and tents missiles should be on 0 kits.
Tenta missiles I probably don't need to explain too much. It's as close to objectively bad design as we have in this game, and it shouldn't be good. And the game is better off if the special is bad, there really is no reason for it to exist in the first place.
But if you look into the reasons why missiles are disliked (aside from it being broken) a lot of them also apply to sprinkler. Especially how they both encourage passive gameplay and special spam. Also, sprinkler doesn't really do anything except paint, and it can't paint in relevant areas because it can be shot down. As a result of this lack of utility, no weapon really wants to have it. And if no weapons want the sub, why should we put it on them?
For both missiles and sprinkler, the flaws with them are fundamental aspects of the sub/special that can't really be changed with reworks. Putting sprinklers in relevant locations will never work unless it can't be destroyed, and that would make it broken, so it can't really do anything except farm special. Missiles can be changed to be less bad, but the entire premise of the special is just... not great. Removing these would also help with being able to put the other subs and specials on more things.