Well, for a QB with no accuracy and no arm strength, Johnson used some damn stunning "intangibles" or magic or something to end up in the top 5 nationally for TD throws of 40 yards or longer. The quote, above, is interesting. It's kinda' like saying that the US had poor war making abilities for a country that won two world wars.
I lean toward many of the responses, above. We have a good problem with our having options at quarterback, and given our 20 year history, there's as much as a 30% chance we will HAVE to see more than one quarterback during the season, because of injury.
I like Johnson, because I saw throws, repeatedly, that would have impressed J-Lo and Couch and Woodson.
Does Johnson improve short passing and ball security? Likely, given he has a full season, and now a Spring and Fall for detailed development.
Did Stephen Johnson have limitations in '16? Wouldn't any JC transfer have had them, the first year on that stage?
Did we use the Wildcat to cloth or hide Stephen Johnson's limitations? Maybe, but we'll have that option, again, to spell whoever the starter is, and it is named the "Wildcat" for a reason.