I think it's hard to judge him from two games. Against Fleetwood he looked to get into different areas and make an impact. He also had better service than he did today against Gillingham.
From watching the game today, I think he would have been better suited to playing on the left wing instead of Dayton. His pace could have been a good thing to use first half, as opposed to Dayton who's lack of pace and inability to beat a full back properly was clear in todays game.
Personally, i'd like to see Poleon up front with another striker, possibly the big lad who came on today. Chris Porter would be worth a gamble to put up in a "little and large" combination up top though.