Does a bear defecate in the woods?
Uh... it's pretty much widely accepted that Mozart was a huge innovator in the ways he expanded the depth and scope of the Opera artform, both musically and libretto-wise. In fact, the greats that followed like Wagner, built upon the expansions Mozart was single-handedly the architect of, and could not possibly have done what they did without Mozart's considerable improvements.No, not really, he worked within a set tradition even if he wildly expanded some of his favourite genres. So innovative with in established genres don't really give that the composer is an innovator, Haydn was, JC and CPE Bach was!
/ptr