Thank you fror your answer.
OK, I can understand some of the reasons why the bpm are always set to quarter notes in Cubase.
I also can see that this can be quite usefull for fancy tempi as you describe them 
But don’t you think it should be possible (at least as an option) to set the bpm to the real note value?
After all a beat is a beat undependently of the note value.
Why I stumble on this is because I have to write scores.
And in the context of music notation it is quite usefull for the conductor to have real bpm values.
EDIT!
False statement about Dorico deleted!