Pyros just aren't fun or good for the game.

They are extremely fast, high damage, can kill anything they don't outrun and can outrun anything they get killed by. On top of that it can jump to escape or come from weird angles.

They don't get that much use because they are in the janky jump factory and they are quite a high skill unit.

I really must also protest against the way factories work with defense - a single pyro should not be able to kill a factory - it's just not fun and makes placing the light laser pointless - it also kills the game before it's started. I do understand that there is some skill about where the place the factory and light laser, but the only skill is on the offense - you can't place the light laser to protect the factory.

I can't think of a single unit that deals with the pyro effectively early game on a metal for metal basis - other than maybe the phoenix - I am always chasing it around the map and spending far more resources dealing with it than it costs.

Sorry for the rant! I love this game. =)