Sorry, but if you're actually going to remove an extremely useful tool as the flashbang, may as well remove it completely. 1 flashbang per team? There's just too much wrong with that.. someone's gonna misuse it or just use it to their advantage only. I agree, I don't like having to see a white screen for a measly 2.5 seconds - nobody does. But entering a different area that you know or suspect could have enemies is 100% less safer than entering after flashing. Plus, a lot of people aren't that dumb... they know to take cover or at least look away. The flashbang is very useful for both teams on almost any maps and is sometimes essential for victory.
And for some reason, 24/7 DUST2 NO AWP/AUTO/PARA/FLASH doesn't really sound very appealing.. replace the server name with any of the other servers and it's the same issue. I don't like getting killed by the P90, but I don't think that should be removed.