Changing Properties of a .Mogrt with Keyframes

I am working on a Motion Graphics template for my school, which will allow them to highlight the name. of a person speaking out of a list of speakers for a podcast segment we are creating. Currently, I have a fully fleshed-out MOGRT that can switch between speakers, and plays a small animation to transition between them.

However, upon reentry to Premiere Pro, I discovered that the properties of a .mogrt are static once created.

Splicing multiple clips together where the setting is simply altered is not really possible, given how I programmed the .mogrt (yes, it took coding in JS to function), and also would be way more time consuming for my editors.

If there is some hack to get this to work, I would appreciate any advice!

It is possible to just simply take my system and make a pre-rendered version where my editors tell me the timecodes they need, and I do it in-house. But that would be incredibly inconvenient and frustrating for me. I caa provide any more details on request. Thank you in advance!