Great suggestion and actually a work in progress. Presets are getting a major overhaul. They have been in "beta" since Color.io launched a few months ago but I have been quietly working on the next major version of Color.io behind the scenes which will be primarily defined by the ability to discover and customize presets and to create custom presets from existing images and LUTs using AI. It's not quite ready for prime time but I'm aiming for an August release. That said, the per-panel presets are going away in their current form. It's still going to be possible to save and apply presets to only parts of the color engine but the UI is going to change (for the better).

@gfc - Halation is now saved along with other preset settings in the next major version of Color.io. You can launch and use the current beta version here: https://beta.color.io