Thanks for the feedback, Justin.
User feedback is a key part of how we prioritize what we work on, so adding your feedback is a good step in helping us gauge the level of interest. This particular feature hasn’t received a lot of interest from the community, so it hasn’t been prioritized yet. That being said, I agree Color Temperature does feel like something that should be added so let me see if I can get it prioritized in an upcoming update.
In the meantime, the approach James mentioned with using a rule is a great workaround for adding tiles for ‘favorite’ color temperatures. It has the added benefit of being able to set multiple bulbs to the same color temperature all in one tap.