So what?
Even Wes Mathews was a role player last season. And he was pretty consistent. Despite being a rookie.
If you are going to play the "role player" card for Miles, then it doesnt fly in the face of Miles wanting to jack up shots like Ray Allen every night anyways.
Wes Mathews, Millsap(even in his rookie year) and Harpring(in his first 2-3 yrs with the Jazz) are pretty good examples of role players who were also consistent. It is not unfair to hold Miles to those standards. Even Watson this year has been pretty consistent for that matter.
You talk as if being a role player and being consistent is always mutually exclusive.