Same thing is happening with baseball FA. The focus on analytics and bang for the buck tells teams not to overpay and join the bidding war for in-their-prime FAs as the fall off is generally sharper than the incline to the prime. So hypothetically, if a 23-26 year old is juuuust before the prime years (27-30 for argument's sake), this pre-primer will still be a better producer analytically for the team than the post-primer 31-34 year old, even though they are the same distance away from their prime.
So knowing this, teams will throw big money at RFAs (Matthews) who they deem worthy, and less money at UFAs who are approaching the big three oh, no surprises.
Teams who are poor at drafting will still try to make the big FA splash to keep their fans interested and vested, but the smarter teams will pay their own young stars early. In the end you pay more for the pre-prime days so that you don't have to overpay for post-prime days.