The problem is really about expectations.
ATC has usually provided pilots with services above and beyond what they are required to provide - over servicing. Pilots have come to expect the (higher) level of service that they received in the past, and expect that service to continue.
Reduced staff numbers, combined sectors, loss of facilities, loss of staff and service delivery means that ATC workload is such that providing services above and beyond what is required to be provided is a luxury that they can no longer afford.
Expect to see more of ATC providing the minimum services they are required to provide.
The times and services delivery levels they are a changin'