But the new baseball is in use everywhere.
Essentially this mean the league OPS will rise with more hits, total bases, and home runs.
I gave an example that Jason Bay’s OPS+ of 134 10 years ago was the same as Xander Bogaerts OPS+ at the time, but Bay’s OPS was almost 40 points higher. This is because the league OPS has also risen, with the Manfred Missile being a likely culprit. (A few ballparks have also changed in that time as well.)
If anything, I see OPS+ as more useful in incorporating these changes in the game, because by comparing a stat to league averages it can catch and account for changes. Stats like OPS, BA, SLG, and home runs cannot do this. ERA+ also becomes more useful for the same reason...