These quotes tell me that's not the case:
"The players in question also haven’t been publicly critical of the previous coaches, but they are making no secret about how much they have learned so far from the new assistants."
And / or
"He (Manuel) was essentially thrown into a mostly shotgun, zone-read offense as a rookie in 2013 minus essential training on how to operate it, and wasn’t helped a whole lot more last year."
And / or
"The receivers showed a general lack of awareness in basic route-running concepts, while the offensive linemen showed they generally needed much more in the way of education about techniques."
You're not wrong that the proof is in the pudding, but sounds like last year they weren't event cooking with gas...