I'd say Burns would be probably on the fringes of that 23 man squad. Looking at the list, there are definitely some other strikers/wide forwards whom Burns has arguably been playing better than, e.g. Bernie Ibini, Daniel de Silva, Tomi Juric, Nikita Rukavytsya. Then there's Josh Kennedy and Adam Taggart who might be better players than Burnsy but are coming off serious injuries (Taggart is still rehabbing from groin surgery).
Definitely some above him in the pecking order though: Cahill, Kruse, Leckie, Troisi probably Vidosic. But he'll have a shot if he carries on his form this month.
Not sure about about Troisi and Vidosic even. Cahill, Kruse and Leckie definitely better. Burns is still not playing at full capacity and seems to have missed a lot of one on ones, but as it has been said I think he plays in a way that suits Ange's style. Ibini and Ruka he'd be competing with. Both of them quite handy players too.