You're not th eonly guy with a miti-weapons mod, i have "DeathTC", a friend of mine has "Doom:Relapse", and then there is the popular "Immoral Conduct" (and some other mods that add weapons into a game).
My DeathTC mod for edge acts alot like the matrix. Your enemies fight fast, and you fight fast or you die very quickly!
Just for kicks I included the shambler in my mod and he's not as wussy as he was in quake - it is harder to dodge his ball-lightning here than it is to dodge bfg blasts in normal doom DM, and his claws do enormous damage (esp. the leap and jump attack - yes, i got him to attack like the quake fiend does, and it does upwards of 200 damage if you're hit).
Belive it or not, there is a pretty nice story behind it, but it sounds remarkably like doom's because it has to - since none of the levels have been changed (well, my RTS's do add items into levels that aren't present in doom, such as extra weapons).
*Infantry are more effecive and tougher attackers.
*Imps are far more dangerous than they were before - like a really weak cyberdemon.
*Totally new characters - UAC commando and UAC commandant (new mapnumber and everything), Uac commando can shoot a machinegun, blaster gun, and heavy plasma cannon. Commandant shoots double shotgun and heavy plasma cannon.
*Baron of hell has been replaced by dimensional shambler.
*Hell knight has been replacecd by a mega imp (translucent and green, does more damage than the imps do and has about 10x the health too).
*Cyberdemon replaced by a fallen angel (black archvile with mega powers).
*Pain Elementals are more dangerous (special attack).
*Cacodemons's fireballs are more dangerous.
*Revenant fires two missiles, totalling less power than they had before.
*All weapons have been modified, Pistol shoots faster and can shoot a 3-shot burst (takes time to recover though).
*Berserk (and conversly, fist) does alot less damage.
(#2)Mp5k (shoots in 5-shot bursts, enemy's shoots in 3-shot bursts though)
(#3) *Shotgun fires quickly, does less damage than doom's, and has the ability to fire shotgun fragmentation grenades.
(#3) *Double-Barreled shotgun is now belt-fed rather than break-down.
(#4) *Rifle (does more damage than the pistol, and has pretty good accuracy, has to reload after 20 shots).
(#4) *Chaingun shoots 20 shot bursts (very, very quickly, but with spinup/spindown), or a slower 3-shot burst continious fire.
(#5) *Railgun (does lots of damage in a narrow path, can affect multiple targets at once).
(#5) *Pin-Weapon (a high-velocity chaingun shooting bullets the size of the pin on your headphones, 2100 rounds/minute)
(#5) *Cannon (a crude recoilless rifle, single-shot only but does decent damage, not too accurate).
(#6) *Explosives Launcher (Rocket launcher and grenade launcher combined, grenades do more damage but rockets can fly straight).
(#7) *Particle Blaster (fires energy pulses, can fire a large devistating energy pulse as a secondary attack... takes time to charge up).
(#7) *Assault Particle Rifle (similar to doom's plasma rifle, best used against imps).
(#8) *Plasma Rifle (not like doom's, fires very powerful balls of plasma with power rivaling that of the doom RL, can fire single powerful blasts or less-powerful blasts on semi-automatic fire... single shot works good for sniping).
(#8) *Heavy Plasma Cannon (similar to doom's BFG, primary fire shoots out an expanding plasma wave, secondary fire shoots out a very powerful singular plasma blast with a small "spray" effect).