Text-based presentations are easier to modify and back-up. At the very lease, Mentimeter should allow for importing presentations in a text format, for example using Markdown syntax. This will improve mathematical notation in presentations as well. Ideally, the QTI format [1,2] should be implemented. This format is broadly used for assessment and there are tools for producing questionnaires in this format.

[1] https://en.wikipedia.org/wiki/QTI

[2] https://digitaliser.getmarked.ai/blog/complete-guide-to-qti/