I agree with the point that Lennon ups his game when faced with competition. He was a stark example of that effect when we bought Bentley. But he was playing on the right wing and having more space, making runs down the wing from a deeper position. I just haven't seen him play effectively in the formation we use nowadays (other than friendlies).
Granted Chadli hasn't shown us a great deal either, one good game against shite opposition hasn't convinced anyone he's the messiah. But I reckon he could end up working better under Poch. He looks up, gets into useful positions, and is more suited to a line of three players that needs to think on it's feet a bit more as Lamela veers in from the right, and Adebayor spends half his time at left back.