I've no idea if this has already been suggested, but I'd REALLY like something like INVS that can be switched on/off by pscn and nscn. It would make miniaturization WAY easier.
Another idea is a solid explosive that is not pressure sensitive and can only be fired by SPRK, and produces a big shockwave. Please don't say C5, as it can't be triggered by SPRK, it freezes, and the shockwave is still weak.

grim-reaper:

if you go on wiki, you can suggest your idea.

I'm gonna quote the wiki here

Wiki:

DO NOT Add suggestions directly to the wiki. Please post them to the forums and wait for a moderator or developer to add them here.

grim-reaper:

oh, sorry

no prob, just tell me what you think.

MasterMind555:

@shikari_rock!122089
Your second idea is Dynamite which have been suggested looooong ago and resuggested and resuggested and modded probably many times.

yeah, I think i've seen it in a mod somewhere once... anyway, i'd like something like that in the original as well.