As someone who does some occasional public speaking, you often have to know what timeslot you have to fill, and try to tailor your material accordingly. It might be nice if the proofread mode in Kagi Translate detected that you were writing a speech or some sort of public speaking material, and provided you with an estimate of how long it will take you to deliver it.
It might even be possible and appropriate to give some recommendations based on the kind of speech (e.g. award acceptance speech (maybe <5 min) vs best man speech (5-10min) vs eulogy (15-20min), etc.)
I imagine there are other features that would apply to helping someone prepare a speech or public presentation that don't occur to me presently.
