Tobar said:

Doubtful, considering Filoni has confirmed that Stormtroopers are not clones. I believe their intentions are as they stated, revisiting the OT era and exploring the formation of the Rebellion.

Oddly enough, I just listened to him in the SDCC panel for the New Dawn book coming out featuring Hera and Kanan and he straight-up said that the due to the rapid aging of the clones, they have "aged out" of the stormtrooper corps. and because of the deterioration of Jango's DNA, many new recruits have been forced into service through fear of the Empire. There are no clones left in the Empire, more or less.

He explained that this was the reason that, by ANH, stormtroopers weren't great shots and seemed to be a little more incompetent.