I've played Suicidal. I find support to be overpowered. Especially on things LOWER than Suicidal. Why would you bother being any other class? Let's take Hard for example. Sharpshooter? Why bother when Support has stupidly long range, and takes out multiple enemies per shot? Berserker? Why bother when Support holds chokepoints and kills Scrakes almost as fast, and doesn't have the same problem with Crawlers? Commando? Why bother playing that class in the first place? Firebug? Why bother when Support does the same AoE that you do and doesn't have problems dispatching tougher opponents without wasting ammo?
This is all very, very true. Tried Suicidal today. No, we weren't newbies, as everyone there had played a good bit and all were at least level 4 in their jobs, most at level 5! Supports were the only ones able to scratch anything, especially larger mobs.
The Sharpshooters would get swamped easily, as headshots don't kill ANYTHING anymore. The piss-poor damage they do on non-headshot hits made 'em get killed easily by a few Gorefasts or Crawlers that would swarm them. And when they didn't get rushed, they ran out of ammo, as it's nowhere near the 'one shot, one kill' that it needs to be for them to work.
Berzerkers were usually pecked to death by Crawlers and Stalkers. Sirens were a nightmare for 'em too, as they can take a LOT of punishment from the pitiful Pistols and slightly less pitiful Handcannons most 'Zerkers carry, and getting close to them on Suicidal is, well...suicidal...
Firebugs ran out of ammo crazily fast (And they were being VERY careful with the ammo usage too!). Enemies also usually didn't die to fire before they were able to close on the Firebat and do some serious harm. The flame-nades were great, though. The biggest problem with them aside from the ridiculously small amount of ammo, was lack of kills (Teammates usually kill on-fire enemies before they burn to death), and how slow the kills actually came in.
Medics were good. Damage was piss poor and they had to focus mostly on healing others. A lot of the medics on our team usually took shotguns, handcannons, or the Bullpup and focused on Crawlers and Sirens. They can take a LOT of damage and live, though.
Commandos were stuck almost exclusively killing Stalkers and Crawlers. The damage of the bullpup on even Gorefasts and the like was terrible. Even picking off Sirens with it was very difficult, taking almost a full clip! Even crawlers take 3-5 rounds from a level 5 Commando...
The Supports were the only real damage dealers. Hunting shotguns shred heavier specs while piercing them and killing mobs. Normal shotguns kill everything else, also penetrating. Uber-grenades helped too. Not to mention the ammo capacity boost. The only reason our supports would die is simply because everyone on the team who wasn't a support was dead and they got flooded.
This shows that support is a perfectly fine class in suicidal...the other classes are just too weak to hold their own. It's not just in suicidal either. YOu can start to notice it even in Hard games...