Coleman gives us so much going fowards and helps give balance to our team. He may have only 1 assist but that's a poor way to judge him on it's own because he's been involved in the link up play on several of our goals this season, either directly in the build up or pulling defenders away from the box to help make space for other players.
Putting some perspective on it, we're 5th and dominating most teams we play in general play. Without Coleman playing other teams would be able to double up more on Mirallas and we'd be forced to focus more of our attacks down the left flank.
Teams have countered us well before when we've only been potent down one side of the pitch.
People should give him some time, he's only had a handful of games in the position and it seems like he's improving all the time.