In other words, it is early. And I agree. But the downside of veterans returning to form is that they will decline. If you don't get excess value in the first year or two, then you are really unlikely to catch up.
If Bichette + Bregman combine for a 6 bWAR, and Mayer + Durbin combine for a 4.5, then B&B is an unmitigated disaster.