You asked why it has 286 armour.
It's because it exchanged higher armour for health to make it more survivable against tank destroyers.
The health is much more powerful than the armour. I don't see why you'd want to revert that.
The Comet has 290 armor + 960 HP now + Cheaper. Why the fuck is that????? Don't bullshit me,
Stugs and Jaegs don't even have as much point blank pen.