Hey Jeff, in short – no easy way. Even if there would be a plugin for this, it should have somehow a list of all available effects applied everywhere in the project. Sounds a bit of a loophole.
As a bit of an improvement – instead of slider control, use checkbox – at least it will be on/off by a single click, not a slider drag. Also, when linking params in the project, make sure to “lock” additional effects panel, that you would have access to it from all comps (might be doing this already though)
Social Media Profiles