Aeon, "thematically", has single-purpose
That could advocate seperating the damage dealing from the tanking
Yes, partly this. My stats given above give the T1 heavy tank 50% more HP and 33% more damage than a Striker at 67% more cost. This will likely need tweaking. The idea is that in groups the Bear (if we call it that) is about as cost-effective as T1 medium tanks in tank battles, albeit slower.
We have sniper gameplay already in t3 level.
Yes. At T1 it would play differently since the ACU has a bigger role. Maybe too much complexity, but Aurora are already a complexity.
Aurora losing range and earning hp would not bother me at all, I would rather be glad.
Sure, we could make the Aurora another T1 medium tank and be done with it. Except various people like faction diversity.
Having shield would certainly add in faction diversity. Making people protect power and avoid stalling.
No. At T2 this is the case: you need to budget more power if you want to build (mobile) shields. (Also for overcharge.) But at T1 power is significantly more expensive and balance already finely tuned (low-pgen land-spam builds or higher amounts for air and/or eco, or early power to rush gun). T1 mobile shields would likely make gun-ACU OP. Also the Aurora is weak to bombers on purpose; a cheesy way to counter bombers in the early game would make the Aurora even more OP.