Direct communication with the thermostat?

[This is a replica of an initial request, please ignore if the first one came through]

Why cant all communications and control commands be sent directly within the local network? Is this something that can be done for us? The reason we need this is that the response time of the thermostat will improve from 2-4 seconds to fractions of a second because our controller would then communicate directly with the thermostat instead of having to go through the cloud.
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