My #1 non-negotiable is - the Bears should absolutely make sure they get a future 1st RP in next years draft. They should enter next year with 2 picks - if for nothing else in a trade down scenario, knowing whomever gets the #1 pick is going to take a QB, you are almost guaranteed that next year's pick will be Top 10 (and just as likely top 5). So you got to get that - cause that is hugely valuable.
Beyond that - if you are hedging your bets, having that pick is huge, because if Fields is good - you have multiple assets to continue to build the team in the right area via the draft (and you can always use the asset to trade back and continue to add talent). But you also now have the option if Fields is bad, to have 2 high picks, which means if you don't think you have the QB - you have the ability take another swing at the QB (leveraging those 2 picks to move up in the draft if you ultimately need to) or to trade for a veteran option that is on the market.
If I am Poles - I have to do that - because it means I'm sitting in the catbird seat and basically getting 2 shots at the QB (1 is Fields, the other is next year if Fields stinks) and you can do it without gutting your team in any scenario (if nothing else - next year's QB will be in an even better position).