Well you should still be able to customize all of that. For example, I only have it waking up the device/screen on if it's my wife or kids. All others just give me a notification ring. Another group chat with my siblings, which sometimes will go on and on....and on.... I have that specific thread set to not ring, not vibrate, just an icon appear (no LED light either). That way I can see if whenever I look at my phone, but I'm not interrupted by constant alerts/vibrations.
However, I agree with the choice - Google appears to be locking down too many things and giving us less options for customization. Reminds me of another company.