I would think controlling color temperature via Scene would be quicker for a group of bulbs than this, and would certainly load quicker on the Home page. There is some time invested in setting this all up the way I’m suggesting, and it will vary by setup size. Yours being definitely above average in size.
I totally agree and have provided this feedback internally previously, as well as @prjct92eh2 comment about color.
In the scenario I’m describing Lighting Groups would encompass your Rooms, and no Rooms would be visible on Home screen (again just a suggestion).
I’d definitely love to hear how this works out for you, I’ve played around with various levels of this on my own Location.