Make Rally’s speed boost apply to Brig’s teammates as well.
Make Mercy’s damage boost apply 30% speed boost to the single ally she is boosting, and during valk is applies to her entire team. (Geoff literally said
Which screams adding speed buff to blue beam. It makes sense after all, it’s supposed to heighten Mercy’s allies performance and make them into super soliders.
And then add a universal rule where speed buffs don’t stack. Bam, Lucio has competition for speed, but it can’t be stacked/abused with one another. The other healer’s speed buffs would be restricted to mainly ults so as to not encroach on his base kit utility whilst still providing other options.