A couple of thoughts on range:
1. The solution that Dan instituted for range 24 and range 30 is elegant enough. Below these ranges, the impacts of range are "almost, but not quite" linear, in reality. But it is close enough to truth for the game.
If you wanted to slap the honest-to-goodness impact of range into the equation, one could argue that you would need to use the ratios of the total number of hexes that are "in arc" when you select a given range.
For example, at range 3, in one arc, you have 9 hexes that you can fire into. At range 6, in that same arc, yuo now have 27 hexes that you can fire into. This is x2 range and x3 total effect! But is this difference really worth delving into once you have square-rooted the effect at the end of the design process? Maybe. Maybe not.
After all...
2. The effect of the expanded arcs causes ships to have to pay too much for overlapping arcs as well.
For example, when you have a weapon in the AB arc, you get the full impact of 2.0 arcs... no so for overlapping arcs which can pay for 2.0 arcs while getting the effect of 1.5 arcs. So there is some fudge factors going on here. Is it worth messing with? Maybe. Maybe not.
And still...
3. Dan is a guy that likes math, and so we have a chart that is fairly complex when dealing with Black Holes. When I initially wrote the rules for Black Holes they were much, much simpler and did not take into account the square-of-distance effects of gravity that I thought were too fidly for a game like this. Was this a good thing? Maybe. Maybe not.
In the end... the three things above all blend together in an odd way. This much is (I think) undeniable. But none of them are broken. None of them make the game less fun. And all of them work.
I would say leave it as it is. The premium at the upper two ranges that were added is about right to account for the growing number of additional hexes available. The weapon arc formula is much easier to calculate as it is, even if it is off by a bit in the end. And the Black hole rules are interesting, and make you think (which you should be doing if you are insane enough to be having a battle near a black hole).
All in all. About perfect.