I'm not going to make that prediction. Even if JB wasn't struggling at the moment, he is still only under contract through next season, so we need some insurance anyway.
I think Love is a great fit for the offense.
Love has PROVEN that he can get rid of the ball quickly with accuracy, both to to the correct hip for shorter routes to get some YAC, and to his open first read down the field.
What I haven't seen him prove, probably because of the college offense, is an ability to sit in the pocket and make multiple progressions. Which is exactly the criticisms I'm reading about JB. And there haven't been a lot of throws on tape where he has to sling it 20 yards with timing and zip to beat the DB that's closing in or recovering. Like a deep out pattern. The question would be, IMO, can he develop them.
OTOH, a traditional pocket passer like Jake Fromm has displayed that ability in spades, but he's short and probably has limitations.
And I'm no QB studier. Its just my amateur observation from the few games I've seen.