Well, I don't see any "big" difference. Not even small Take EVE-online. The difference between 70 km and 100 km optimal is a difference, because you have to cover that distance and this takes time. You have to maintain that distance and it is also not easy because maneuvers take time also. So it is a game between you and your enemy. In the Perpetuum 30 meters is not a distance. It can be covered in couple of seconds. If I have 70 optimal and you have 100, and we will try to keep our optimals, we will be dancing within those two distances. So there will be no real difference. Few seconds on your optimal, few seconds on mine. Off and on.

The difference about couple of hundred meters would be more interesting And by the way more realistic.
What is the optimal range 70 meters? It's not a cannon. It is not even a gun. It's like a small pistol
I think, with given robot's speeds, would be more logical make cannons 200, magnetic 400, lasers 600. It's a roughly speaking. I'm not proposing exact numbers and proportions, but something like that.
It would be more interesting and in a way to using landschaft. I.e. lasers are long, but hard to use them on non flat surface.

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Yes, and we also must have options to make bigger game interface and fonts