Elementor Pro has dynamic tags and this is a big part of the meta box integrations, i get that.
But please keep in mind that there are many Elemento Addons (like 10web builder, ElementsKit Pro, Essential Addons, and so many others) that also allow using dynamic tags, custom css, etc. So it would be great that we could use the Elementor Integration with those addons as well.
I own like three or four of these addons, and I'll happily activate them in a test site where you could play with them to see if it's something achievable or not, this would certainly make it more attractive to more meta box users (current and potential ones).
Thank you for your suggestion. You can create a new feature request here https://metabox.io/contact/, I will forward it to the development team to see if we can do something from our side. Anyway, we don't promise or guarantee future support.