I too think that the current generation goes a bit overboard. In my current game I have discovered maybe somewhat over 50 systems, and quite a few of them turned out to house even 8 jump points. I end up trying to ignore those nodes as dead ends, because making so many links make sense on the galaxy map to maintain oversight becomes really difficult to do. It is also frightening in general to end not on a T-intersection, or a crossroad, but have so many directions open that you have to "work through" before you feel you have really progressed one jump more away from home. There is some style to it if it happens once in a while, so you have some sort of space-hub-anomaly system, but in praxis it seems that every 10th is already that bulky (judging by my this one recent game of mine), and every 4th or so at least exceeds the 4 JP margin.
So I would definitely like to see some curve or so that makes systems over 4 Jps maybe exponentially more unlikely, yet not impossible, - or just something in that direction.