I have 3 heat pumps each controlled by a basic Nest Tstat. The Nest allows very basic stuff but is missing some features my old Tstats had (such as vacation mode) and manual over-ride use (manual hold and resume) is clunky. I would like to update to something with advanced features and easier manual over-ride use and also allow the Tstats to interact with each other to limit peak energy usage by only allowing a single heat pump to operate at a time during peak schedule. I am not interested in learning, AI or occupied features. Is there a smart thermostat that natively supports load controlling in this way?