1. Fix the bugs! Make Demo Expert work with all weapons. Currently it does not work with the Missile Launcher, Fat Man, Dynamite and C4. Make Hit the Deck work (it does nothing) and make Splash Damage work (it does nothing)
2. Lower the prices of Ammo and make them more common. Really, Frag Grenades base value is 150 caps. The 357 Magnum base value is 110 caps. That is nuts. Make Frag Grenades cost 30 caps. Drop Incindary Grenades down to 50 and Plasma Grenades to 75. Right now Grenades are good for one thing - selling for caps. Also, make ammo more plentiful. Why is it so hard to find regular 25 MM ammo. And the 25MM HE rounds are insanely expensive. Same goes with 40 MM ammo - very rare.
3. Crafting - I don't think there is a single receipe for explosives. At least allow us to brake down and convert guns ammo and energy weapons ammo into frag grenades, plasma grenades, 25 MM, 40 MM and missiles.
4. Change the Damage Calculation for HE Ammo. Right now the bonus damage for HE is applied after the targets Damage Threshold reduces the damage. Instead make the base damage from HE Rounds higher. Or add a reduction to DT to the ammo type.
5. Increase the hit damage for 40mm, 25mm, Missiles and the Fat Man. Right now, due to a bug these weapons do no extra damage on a direct hit except in VATS. If this was fixed I would love to see these weapons do double damage on a direct hit. Go Google what a direct hit from a 40MM Grenade does. They can take out lightly armored vehicles. Direct hits should be devastating. Nothing worse then hitting some monster in the HEAD with a missile and having only a qrtr health removed.
6. If number 5 is impossible to fix, then simply increase the damage for those weapons. Make a 40MM Grenade do 75 damage and a 25 MM Grenade do 55 damage. If the Demo expert is fixed for Missiles then they need to be dropped down to 150.
7. Change Demolition Expert to two perks that give a 30% bonus or three perks that boost damage by 100%.
8. Move the Flame Weapons - Flamer, Incinerator and Hvy Incinerator into Explosives. Right now an explosives character has no real option once a monster gets right in your face. Having a Flamer would give you something to use. Also, give a low DT reduction to Flamer Fuel - like 5 points and create a new High Burn Fueld that would strip off 15 points of DT, but would increase wear on the weapons. Give me something to kill that Deathclaw that is point blank!
9. Increse the effective range of the Grenade Launchers and make them more accurate. Right now these guns have a very limited range of use. They can not hit anything far away and anything close will kill your character. I would not be suprised if you could throw a Frag Grenade farther then a Grenade Launcher can shoot.
Edit New One!
10. Sometimes Explosives will do no damage. This seems to happen the most with the Grenade Launcher/Rifle. The target will become completely immune to all Grenade attacks taking 5-6 Grenades and no damage.
So thats my thoughts. I think those changes would make Explosives a much more interesting and useful skill. What changes do youo think would make exploisves better?