Sorry, for the same reason as above, im not really interested in adding any more options that require additional settings because the settings screen is already very clogged. Maybe at some point, but this is already 10x more configurable than anything that was previously available besides maybe tuna. Every additional setting is a big increase in maintenance overhead as well, because of the 15 different supported translations and mutually exclusive settings.
As far as controlling how fast the card fades when there is no music, i will not change that, as when there is no music playing it is the only time we can ever have the opportunity to show the plugin attribution (assuming the user has not disabled it).
I will also not change the music source to be user configurable as there is really no good reason for most people to ever want to do that, and it will lead to way, way, way, way more user support issues where the answer is always "Have you selected the proper music source?". Priority ranking of sources is the best solution with the least amount of potential for frustration.