I've been a lurker for a little bit and signed up to give my few thoughts on Allen. I'm far from a expert so take my post with more then a grain of salt.
Allen seems to be making improvements but I think his completion % being low has really been hurt by the WR's not getting much separation on a ton of plays, Foster has been a great assist of late but other then him Allen hasn't had much to work with(looking at you Mr. I cant take a step forward Charles Clay). If we can find another WR and get a O-line that isn't terrible I think we will all be happy :)