I have to agree that some maps need limit on demomen, but others need heavycap. 3 heavies on any payload that just follow cart? Especially if red isnt organised to sticky them all up.
I'd say goldrush needs one, especially on the first stage... But Dustbowl simply wouldn't be the same without demospam
First its the engy''s, then its the snipers, then its the spy''s, then its the heavy''s (yes they have a limit too) and now its the demo''s.. i think its just fine as it is, you just cant change limits so that noobs "understand it" if you limit popular classes too much people will complain too (more then people that complain that is to much) its a balance thingy.. and its hard..