You may find that you get better spacing out of the box if you turn off Avoids Collisions (or switch on and then untick) for the text object. Yes, it’ll superimpose the text object on the tempo marking and yes, you’ll need to laboriously shift it up manually in each of your layouts separately (this is an irritation not found in either of the other big two commercial programs with regard to system text) but at least both the rit and the following tempo mark will be in the right spot.