Give Drew credit for admitting the deep throws have been missing.

Jameis wasnt ready because Drew was still here, taking all the snaps. If Drew retired, Sean would have had Jameis ready in 2020.
He wasn’t ready. When Jameis went in for Drew during the 49er home game he almost threw an interception two plays into the series. Jameis needed every bit of that full year to set back and just learn this complex offense. Getting to watch Drew operate in his capacity as both QB1 and the face of THIS franchise was integral to Winston’s development.

I believe if you asked JW in private Winston would probably tell you it was best that things worked out this way. Jameis had the freedom to just be a sponge. And, now, after a year of learning, we get to see what he was able to soak up.