What if more champs had special effects when on both teams? (Like Draven's axe catch)

Every so often I see the "did you know" that says Draven can catch the axes of an opposing Draven and I got to wondering how it would be to have more champ's unique effects work for both sides champ when there's two.

Like Zac healing off of any blob, not just the ones he spawns.

Or Rek'Sai going through any tunnel.

Or the upcoming Bard taking the other bard's chimes.

Obviously some would be a bad idea, like Thresh taking any and all souls that drop, but since you can only have doubles in TB, normals, and special game modes, it wouldn't really break the srs bsns modes, and would be really neat.