Where are the:
- block of C4 with wires stuck in it?
- flammable barrels with volatiles inside that explode and spread flames?
- piles of old artillery shells or bombs, a hazard waiting to go boom?
- directional explosives that can be wall mounted?
All of those things could be used as payloads for traps. I'm hoping that we might see a bit more variety in FO:NV. Maybe it will give some modders ideas for creating resource objects.
The other half of my wishlist is more triggers. Like tripwires that are simply two metal stakes with a wire instead of the current rock w/ stake on one end and rock on the other end. Or a tripwire where one end is a metal stake and the other is an eyelet that looks like it's been screwed into the wall. Maybe 2 additional variants for each tripwire, one that is 75% of the length (scaling works... but not completely) and another that is 150% longer then standard.
A pressure plate that doesn't look like it's from the medieval period would be nice. Something rectangular and a bit thinner to the ground.