I thought I would bump this to point out an (obvious) additional benefit that would come from implementing this request: Compound time signatures.
An example would be: In 6/8 the beat can be either the 8th or the dotted quarter.
The heavy lines in the grid should fall on the beat, But Cubase doesn’t do that, and the metronome just marks the numerator’s number of beats per measure (top number in the sig)
While it is possible to go into metronome settings and adjust it to 3/8 count base to get the metronome simply on 1 and 4,activating the count base option means the click will not change along with the time signatures.
It comes down to the fact that we need to able to set the beat value ourselves.
I updated the OP and subject line too.