This is my sentiment. However, I do think there are points to be made on both sides.
The old argument of "Tankers are just Brutes with less damage" has a bit of truth to it. Sure, gauntlet is better than punchvoke, but the Brute only has to work a tiny bit harder to hold aggro just as well. Sure, Tankers are still tankier while leveling up, but the vast majority of the playtime of a character is going to be at higher levels when it shows less and less.
Then there's the new argument of "these changes would just make Tankers into Brutes." If they have comparable damage output and the same level of protection, that makes a lot of sense.
I think the biggest point that I'm seeing, if boiling all of them down, is that Tankers need something unique to them that isn't directly related to damage or protection. Sure, Tankers shouldn't do as much damage as Brutes (and honestly should be hardier--that's more difficult to fix), but these aren't the terms on which we want to compare the two archetypes. The different archetypes in the game aren't unique because they do similar things but because they do things differently. My opinion is that it has to be some mechanic that you only see on Tankers, perhaps something that benefits team play more than solo play.