I think we already have that with the Micro Panel.
If you really want a very small $300 color panel, get the Tangent Ripple. It's perfectly serviceable and will at least do those basic functions. The most important thing is you can turn two knobs at once, which is mandatory for most color correction (at least the way I work).
Ellory Yu wrote:The micro panel is still expensive for the majority new Resolve Studio owners who bought the Pocket 4K and are not dedicated professional but just looking to have a better controller than just keyboard and mouse.
I think they need to lower their expectations. As I often say, one thing most users don't think about is that while Resolve itself is affordable, the reality is that if you need a really good setup capable of doing very high-res projects with demanding source material, you go broke on the "everything else" necessary for post: monitoring, scopes, storage, backups, the workstation, GPUs, lighting, and on and on and on. Even at a very modest level, you've got to have a calibrated display and a basic control surface. A macro panel (like an XKeys or a Streamdeck) is an inexpensive way to add lots of functionality to a basic panel.
Bear in mind that 11-12 years ago, a Resolve system (or any other first-class 2K system) would have cost you a million dollars with all the peripherals. The question you should be asking is not, "why is it so expensive to set up a color room?", but instead saying, "isn't it amazing that it's so affordable in 2020 from the way it used to be?" The glass is half full!