I have A few Ideas for some changes to dark avatar.
#1 I would like to have events that are triggered, what i mean is that certain paremiters would need to be met before occurence.
A few examples would be. :the universal population reaches a certain point and
A new race appears.this race would not be trying to win or colonize ,but its goal is to invade planets. upon success, the planet is destroyed completely thereby spawning a new (we will call it a locust ship)enemy unit. the consumed planets quality level would determine the spawned ships strengths.
a star goes supernova ( with some form of warning of this occuring many turns beforehand)destroying every planet .

#2 permanent wormholes which allow travel between the 2 holes ( I have found on gigantic maps this would make progress a bit easier(perhaps this could be a research tech allowing construction same as a starbase and linking of 2 holes would allow travel between the 2

#3 planetary impacts from asteroids and comets which would wipe out various improvments
this would happen almost every turn in at least one part of galaxy and can be prevented on planets by adding a defense improvment.

#4 rouge planets. stars .the galaxy is not a static object ,everything is in motion and not all stars and planets are in stable orbits, so why not have stars and planets that wander. which have movement throught the galaxy.

i have more ideas but I would also like a bit of feedback on these and if you have any ideas please add your ideas. perhaps this could turn into a sticky Mod ideas forum