Well, I believe you should leave aside what readers want if it has been troublesome lately, latest thing you would want is to burnout.
To be honest, regardless of format readers just want to consume and quickly, they want the long chapters but they also want them quickly, but to be fair, you can't always pick the cake and the bread at the same time.
I think if you write down an announcement explaining why are you going to change the phase, then they'll understand, if not that's still on them. Do what your time and needs allow.