I don't care about score either. Usually I find that Commandos and Sharp Shooters are at the top and that's fine with me. Lately there seems to be alot of guys who go out of their way to make sure they are at the top, at the cost of team play... if I'm playing with my friends we tend to kick those people because they end up being liabilities.
I have to say though, I'd never use an M32 on FPs unless it is an emergency, for instance if we didn't have a sharp shooter or support specialist on board. What difficulty are you playing on? That's one of the times that you MUST spam that gun to kill, unless it's on a low difficulty? I completely ignore big zeds until I have a LAW, unless I'm the only one able to dent their health. And avoiding purchasing pipebombs? That's the hallmark of Demo! Best way to kill the Patriach bar-none, and great for taking out Fleshpounds if you know their route on the current map. The new M4 grenade launcher might be good for killing trash if that's your thing, probably better than the medic gun, but I'm not a fan of it. If you double as a medic that's all well and good but I'd prefer to focus on weapons actually for the class.
But I digress... obviously we have different play styles and different opinions on smoke. If indeed the smoke is dense and opaque for balance purposes, Tripwire will no doubt ignore this thread. I however, don't think that balance factors into it personally. I think it's just a game effect that they went a bit OTT on.
@ nutterbutter: Comparing a Demo who blinds the team with smoke to a noob that rages the FP is not a legitimate comparison. A Demo needs to kill stuff and is doing nothing wrong by firing grenades. As I already said, it's not always possible to get off clean, distant shots, and far worse not to do anything at all. Someone raging a Fleshpound as a class that can't handle the consequences is just someone who doesn't know the game well or just a terrible player. No comparison at all.