I’m in the same boat that MHC’s response time is not as fast as I would like. What are people’s expectations here? For me, I think within 48 hours like a business communication is reasonable. Not necessary a completion of the asks, but at least an acknowledgment of an email received and working on them.
There's lot of discussion about MHC's response times here:
Globalist Concierge Advice - FlyerTalk Forums
It seems in most cases that expecting a 48-hour response time is not realistic.