With the ERJ, are they now adding frequency?
We continue to see the effects of CO's fleet shortage. And as air travel rebounds, I suspect we'll continue to see these types of issues crop up until they get an influx of new planes.
I'm assuming these aren't easy decisions for the ops folks. While the 735 was full in one direction, it could have been 50% full on the other. So they have to factor the average 75% load with the fare mix vs. a 100% full ERJ in both direction and 25% lost business. Then offset that 25% loss by those who are connecting (some of whom will simply pick a different CO route, so there's no loss of business), and perhaps the loss is somewhere along the lines of 10% - 15% (or about 11-16 seats a day).
Now if that 735 can perform better on a more lucrative route, more power to them. Just send some drink certs to ease the pain of the ERJ for 45 minutes (at least those who don't do no or 'limited beverage service).
Good luck to the "heartland people" of CLE.