Ok I know saying “parametric design” is a slipery slope and a pendora box in term of feature to add. But hear me out about an idea to start small;
I often design things with box joints, and from one project to the other my material thickness can vary.
I’d love to be able to assign a variable to a line (selecting multiple lines and assign them to a variable), and later being able to change that variable value to see all my box joints adjust to the variable value.
This kind of mechanism must be designed into the original package. It’s been brought up before and deemed not doable with the current architecture of Lightburn.
Here is a similar request that Oz responded in the feature request site.
There is a link in the upper right feature suggestions that will allow you to log in and post a suggested upgrade. Then we can vote on it.
Do you know about the Tab and Slot resizer tool?
Ohhhh… you just made my day. This is exactly what I need. Thank you so much 
You’re so welcome! 