Sounds normal to me. Normal difficulty with default settings is near vanilla biter experience. It's not supposed to be challenging. Proper leveled gun and laser can clean them easily. Evolution is also only one of the factors. If you tune some of attack settings down, then they evolve slower in strength. But at 0.9 evolutions, the variety of units should be maxed out. Higher tier unit requires more pollution to spawn. If you don't actively killing them or have a very large working factory, the attackers may spawn a bit slower.
Which enemies are on your nauvis?
Interplanetary attack only happens after you kill their spawner in their home planet. Char/aiur/earth depends on the race.
Appreciate the response! Upped it to hardcore difficulty but not noticing much difference. I had some protoss on nauvis but i haven't seen them in awhile. About to go hit earth to try to trigger interplanetary raids. Do you usually advise going to trigger attacks from other worlds as soon as possible or is it generally once you've unlocked the base planets and setup there?
I thought the flying enemies were just base units, didn't realize they were from the raids! Thanks
Edit: Whew! Went to earth and took out the main base with a shitload of marine mk3s. That was intense. Don't think I can survive there yet though lol
