Probably the biggest issue I have with GC2 is that the races felt too similar.
- They all had similar tolerances for planets (ex: ideal for 1 race is ideal for all)
- Things like approval were similar (ex: for Drengin, perhaps conquering a planet should increase approval and give "slaves")
- Emphasis was similar across the races (ex: culture was doable by all - nobody had a culture penalty)
- The tech tree and improvements were a step in the right direction in Twilight, but it needs to be expanded on. Perhaps different races should have different weapons and different specializations.