Completely overhaul the complex configuration, it's incredibly difficult to do simple things like creating a button on my dashboard to stop my fish tank pump for 15 minutes. Or to take photos when unifi protect camera AI detects a human, and display that on the dashboard. They are already sensors but building controls for any of these actions and automations relies on bizarre hacks and insanely complex yaml. Or creating morning routines for my lights based on a number of factors, you need countless plugins for basic configurability or basing lighting on sunrise/set times. It should be easy to create controls to do things like disable a routine for a few days.

The programmability is poor, it's like it was built by a bunch of hobbyists instead of software engineers.

And stop deprecating built in features with extremely short notice.