They were willing to trade multiple first round picks for an established top 5 QB.
They don't have to draft a QB this year or next with Winston on a 2 year deal. But, they can draft one if one they like falls to them this year or next year. I do think that they would be willing to trade up for a QB they like, but they now aren't forced to do it. But, trading into the top 10 or possibly into the top 5 is very expensive and even more expensive if we are picking later in round 1. And, it's possible no team will be willing to give up the chance to draft Young.
That is, unless Young has a bad year and falls down the boards.