SO you can control the outlet directly locally… you just cant w/ the any ST app. With the aeon minimote (default DTH only) conntected w/ the smart lighting app (no other app will do) to map the buttons the the device you want to control and a standard zwave/zigbee outlet (default DTH only) you can control your devices w/o going to the cloud.
List of devices that can run locally
Secondly unless you are VERY far away from the US or UK it should not take 30 seconds to process a command. If you are not in the US/UK or you have seriously crappy internet and need all your automations to be local you might want to check out Hubitat.