Why do you fail at Hashmal?

[Zojha]

But then you mess with the HP checks and tankbusters we have as well.

You're messing with it, sure - But you're messing with it every single time you upgrade a piece of gear, every even patch when the iLvL gets raised, every expansion when unsynced comes along.

I see no issues "messing" with old content so long as it doesn't make it impossible to clear, it's old content. And if you go min-iLvL for the challenge? Well, you'll get your old HP values and properly fear that mechanic again.

In case you misunderstood: Ramping up the health scaling means newly introduced items get relatively more VIT to gradually increase the gap, not that you suddenly give every item thrice as much VIT overnight. New items already give you more VIT, they already make old mechanics lose their sting, go back into O1-4 at the end of SB and you'll have an easy time seeing as much (or just run some unsynced coil for the lulz). You simply accelerate that process until healing is relatively weaker.