I think this is a mis-use of peak/aging data. That peak age is an average over thousands of players -- it is not very likely that a subset of 5 guys will match it with any useful precision. Imagine if the average marriage age of your school's alumni was 27, and you were looking at a group of 5 of your friends. Very unlikely you will get 5 weddings in one year! You might not even get one. And even looking at an age range -- say, age 26-28 is "peak" -- a single season is a small enough sample, that it's quite possible you won't be able to distinguish peak talent from normal statistical variation. Age 25 could look just as good as age 28, etc. The Twins had the 4th best run scoring offense in the AL last year, and 4th in wRC+ too. It would be unwise to plan on them being even better 3 years from now, to any meaningful degree. They need better pitching (only 9th in run allowed per game, 11th in FIP-), and they need it now or they risk wasting more good offensive performances.