I can give some suggestions regarding the dependencies:
- Some assets solve this by making separated assets inside the asset to allow the developers to install them in case they have the required third party dependencies. For example, the assets of Pixel Cruchers have inside them separated unitypackages to enable the support and integration of different assets in case the project has them.
- The other option, similar to the previous one, is to have in the Prata Sub-Menu buttons to enable the support of third party assets (like the New Input System) in case the developer wants to enable them.
- Or, as a last resort, inside the code directly detect if any third party asset is enabled, such as the New Input System, which has those conditions.
I wish you luck with the development of the asset.