Bortles wasn't on anybody's radar going into the season 2 years ago, they aren't always there.
At any rate, I just don't see the options being there at QB this year assuming we are picking somewhere around 15-25. We'll see what happens with some of these guys but generally speaking I think we're going to have to wait for one of two things to happen, 1. we have a year where we completely suck and get a top 5-10 pick in a good QB year or 2. a guy unexpectedly falls, we take a chance and make a move for them, this option would probably necessitate a trade up into the back end of the 1st/top of the 2nd, like a Teddy Bridgewater situation.
I just don't think it's likely that we end up in a situation where some great QB prospect drops into our laps in the 15-25 range.
Personally, I'm hoping we can find some way to land Kyle Allen in the 2017 draft but it looks like he's destined to be a top 5-10 pick.