Testing with updated patch:
1 opponent, no minors, scattered map
Relics, Black Holes, Asteroids, Nebulae, Anomalies, Pirates all turned off
Abundant Stars, Abundant Planets, Abundant Habitable Planets, Rare Extreme Worlds
All Counts do NOT include opponent's homeworld (unlike my last series of charts)
Tiny: 11, 19, 13, 13
Small: 23, 21, 27, 16
Medium: 42, 42, 38, 47
Large: 78, 61, 65, 67
Huge: 91, 114, 127, 120
Gigantic: 187, 178, 175, 203
Immense: 254, 303, 265, 303
Excessive: 390, 391, 362, 385
Insane: 563, 536, 596, 571
So it looks like the (unintentional) cap was dealt with, but I'm not sure what else. Part of the difference in the charts is due to the realization that the number of opponents changes the number of planets that are available to be colonized since faction home systems apparently get generated after everything else. Thus I made them all 1 on 1 maps to cut down on the variables and focus strictly on non-faction planet generation. I suppose I could whittle down even further to isolate out Mars, Earth and Kona, but I think the above chart shows things well enough.
The upshot is, while the cap was dealt with, Insane maps are still around 40% the size they once were.
HOWEVER, Frogboy DID say this was moddable. So as long as we can isolate what changes what and perfect it, it's not that big of a deal.