Arsenal have a bunch of midfielders that could really do something good between now and the end of the season. I've made a point of avoiding them because they're no doubt going to be infuriating, whether it's because of rotation and inconsistency.
Chamberlain can either be a great purchase or a bench warmer. Next season he'll probably be a top 1st team player, with a decent FF price too... but I don't have the balls to gamble on him at the moment.
I'd wish you luck with him, Ade... but I just saw who was 2nd in the Board league. Red card please!