Best would be to give us direct control in the settings (with a hint and default values what is reasonable per galaxy size):

- Directly specify number of stars (up to a limit depending on galaxy size).

- Directly specify number of planets (up to a limit depending on galaxy size). Allow stars without planets (don't know right now whether those exist already) so that if number of planets is lower than number of stars that's no problem.

- Specify number of habitable planets as percentage from number of planets.

- Specify number of extreme planets as percentage from number of habitable planets.

- Specify number of asteroid fields as percentage from number of stars.

Leave the current settings in as means to randomize the galaxy or add to all of the above settings a randomize possibility that creates numbers at around, say, +/- 50% of default values.

Yeah we really get to many habitable planets on rare,

~500 on a the biggest map when the max is 640 seems just not right.

also even if you mod it to allow more habitable planets you only get ~1000 on abundant,

which seems wierd seeing that the modifier in the xml ranges from 0.1(rare) to 66(abundant)