I am also not a fan of this. I thought when it first came out it would be cool, but I hate having calls interrupt me on desktop and cut out my audio etc. I am not a fan of notification overload and everywhere. Probably one of the reasons I never got into having an Apple Watch.
Just to be clear, my problem wasn't with my Mac ringing for a call on my phone. My problem was that the call alert could never be dismissed from my Mac.