Heals getting stronger is only really something that's needed if the damage we receive increases with it proportional to the amount of healing we can dish out. We haven't really had enough extra incoming damage to warrant the stronger mits and heals we've been getting unless you somehow convince a party member or 2 to stand in the orange every 30 seconds.

Now I'm only talking from a casual perspective here, I haven't touched Savage since P1S, but I think part of the problem is that avoidable damage deals a lot of damage while unavoidable damage ends up feeling like a tickle. I think it'd be better if it was swapped; avoidable damage tickles, but provides otherwise annoying ailments that really discourage people to get hit, increases vuln stacks, etc. and unavoidable attacks should hit hard and frequent enough that a healers output should be needed every minute or so.

Also tankbusters should actually be able to live up to their name, the increase in power that the short cooldowns have gotten in EW and the new upgrades that the 2 minute mitigations got have only made the tanks practically invincible, especially since we still tune the busters for someone who just doesn't press their buttons.