The idea of remapping transforms from one channel to another within transform constraints is indeed a compelling suggestion for Spine. While your specific request for a new section in the transform constraint properties to facilitate this kind of channel mapping is not currently available in Spine, the concept of customizing constraints to achieve advanced rigging effects, including manipulating transform properties in various ways, is a topic of ongoing discussion and development within the Spine community.
There have been several feature requests and discussions around enhancing the flexibility of transform constraints, including controlling transform properties separately, applying constraints with more granularity, and even linking different types of transformations (e.g., translating affecting rotation or scale). These discussions indicate a strong interest in expanding the capabilities of Spine's rigging and animation tools to include more sophisticated and nuanced control mechanisms, such as the one you've proposed.
Your idea aligns with the general direction of making Spine's rigging system more powerful and versatile. While there's no direct mention of implementing exactly the feature you've described, the ongoing discussions and feature requests suggest that the Spine development team is open to exploring ways to enhance the functionality of transform constraints and other rigging tools. It would be beneficial to keep an eye on official updates and feature releases from Esoteric Software for any developments in this area.
