I need to go back and see if this holds up in other leagues, but the DH leagues so far seem to need way more IP than the non-DH leagues.
In the 4 non-DH leagues I'm in, teams are averaging about 132 pitches per game (plus or minus 1).
In the 2 DH leagues I'm in, teams are averaging 140 pitchers per game (90M) and 142 pitches per game (140M).
You need 10-11 IP/162 for each pitch per game, so that suggests DH leagues need something like 80-100 extra IP. I had always assumed they needed like 30-50.
This isn't because the DH leagues have lots more PAs. They have about 1-1.5 extra PA per game, which is what you'd expect replacing a pitcher with a DH. But that only accounts for half the difference in pitches per game. The other half, at least so far, comes from the DHs apparently drawing more pitches in their outs than pitchers do.
Owners tend to draft a lot of IP in high cap leagues; usually too many in my view. But they don't do that in low cap leagues. And I suspect we will see some serious fatigue problems hit the 90M league as the DAMP gets withdrawn over the next few days.