Hi @egladil,
I'll add a setting for minimal amount to the mod settings in the next version, I'll let you know when it is released.
And regarding the selective tracking: you can already un-track all sites for certain surfaces through the surface overview. But the issue is that new sites still get added on every surface unless it is disabled in mod settings. I'm already planning to improve the settings for auto-tracking, so I think you'll like the new system. I'll let you know when I'm done with it.