What kind of bulbs are you using? Most of the z-wave ones I found do not have great CRI and the cheap ones generally don't support white color temperature at all (falling back on some RGB).
https://www.amazon.com/73742-SYLVANIA-Adjustable-SmartThings...
Smart things has been a bit of a mess lately with their automation related to zigbee. They've got a hotfix rolling out, but it's been a month or two of random lights turning on or refusing to turn off.
I would love to find a replacement that supports multiple color temperatures.
Suggestions solicited!
Some manufacturers make dumb bulbs that dim-to-warm, which are very nice for some applications. (Dim-to-warm recessed LEDs exist, but they weren’t optimal for my application.)
The decision was made easier when the living room ceiling collapsed on me.