Now set all the vocal tracks to a subgroup that tunes the vocals and adds any other effects, and one VST set can be on all tracks.
You could also use the AUX slots, but only with a few routing defaults changed.

That covers the 'supply it to all vocal tracks' part using just one instance of the tuner. Instead of on every track.

I do not work here, but the benefits are still awesome
Make your sound your own!