In earlier releases of DW, as your planets were settled by races other than your starting one, you eventually got the bonuses for those other races after they reached a certain percentage of your total population.
In my current Universe game, I have my homeworld (7 billion Yl'ta), a minor colony (30 million Yl'ta) and then a conquered Boskaran planet that had started as an independent but graduated to a full empire just before I took it (4.6 billion Boskarans). So my empire is 40% Boskaran, which in earlier releases would've definitely provided some bonuses.
However, when I took the Boskaran planet I never got the usual notification that I now had their bonuses, and neither the Empire Summary screen nor the Diplomacy screen for my empire show any bonuses other than for the Yl'ta. Has this changed in Universe, or should I move this to tech support?
To be honest, if it's an intentional change, then I think I'm in favour of it. In previous releases, the Assimilation racial policy was the only sensible one (unless you wanted to roleplay). This would balance the policies a bit more, but I wanted to check that it was intentional.