I’d say 3-5 years but yes. The bears really only need a couple more pieces to have a competitive roster. If fields can get the passing game honed in, which he should with this better OL, all that’s really needed is a couple defensive players to become contenders.
Discussion
10 years ago I’d have agreed with you, but this is the new NFL where you can’t play aggressive defense and (heaven forbid) tackle a QB.