Heres the issue with baptiste. who do you replace? Does he have potential abasofrigginlutely but the issue is who do you replace?
Brig has aura healing, damage, rally, and the potential to disrupt shatters and sound barriers.
Zen has damage, damage amp, and trans
Lucio has speed, sound barrier, and aura healing.
The most likely candidate, As you said, is Brig.
But if you take brig out of the comp, your entire team comp is decimated by dive.
that’s why brig is so essential, she makes it unkillable by dive.
You could argue that the IF could stop it, but tracer can get a full clip off before the animation of IF is done. at which point you’ve waisted a cooldown tracer is gone, and the enemy is focusing that field to finish you off.
The looming threat of brig is what makes Goats so powerful against dive. because if you run it, she counters it, and you have to swap all your heros, resetting all your ultimates, and putting yourself at a huge disadvantadge.
I really just don’t see where he could fit in to make the comp better. Could there be a variant with him? sure, but would it be better than the current variant? Doubt it.
EDIT: also theres ana who Completely counters the IF sure youll stay alive, but you cant heal in it, and you are only delaying your deaths and setting up for an easier kill for the enemy.