The challenge for David is that Quins have a lot of in form players who between them can play 11, 13, 14 and 15. Marchant in particular is an obstacle, because if he is fit, he plays, and Eddie wants him to play more on the wing, so oftentimes David will be fighting Green, Lynagh and Murley for two slots.
It also takes time for players to get attuned to the Quins system. Green was here for a long time before we finally put him on the pitch, but he's been an automatic pick ever since.
David will have to bide his time and wait for his chance, but it will come in time.