I have a mixed feeling about this. You changed building build time, and research.
The most important question now will be : Does the biggest Genesis players can build bouding's on all their planets with the res that they can produce, harvest.
If yes this will not change the growth factor of genesis3 at all here.
In classic uni its not the time of build what determined how fast you grow. It was how much resources you produced/farmed. How big your MSA's were on all planets basiccly.
If somebody have a very big account - it's not that easy thing to build on every planet a big building.
If somebody is building some high lv mine now in Genesis for 20-30 days, and durring this time he can make enought rosources to start another 13 other simmiliar big buidlings on each of his planets - this change will do barelly nothing.
In the end he will get almost the same of number of resources from those mine if you would not change this.
The only difference is that he will recive (in this example) higher lv mine later. Rest stays the same.
I bellive the biggest account of Genesis may be much bigger than Retro/Nexus ones on the end. And those cuts that you writted may not do enought to satissfy clasisc uni players then.
Time with tell Dschi.
Regards