Pleased to attach, a new prototype script / tool and it's seemingly working nicely (*).
Sets or sizes dim text font heights fast, interactively. You can use mouse or keyboard...

Command line word & script name "dimfont"






Run script and then select dim-annotation objects:



OR select objects and run the script....

Allows multi dim-text object selections BEFORE running the script...(not during)









Might be expanded to cover other elements 'another day'...
* feedback/input is welcome.

OTHER: Slider goes upto height "200", if you need bigger overwrite using <height> field,

How to 'install' scripts & 'assign' shortcuts:
Install scripts
Assign shortcut keys via options/shortcuts