This is an issue I've seen across the board for Adobe software. On a 24" screen (1920x1080) the UI font is tiny. On apps that do have scaling options the large size is either insignificantly larger or jumps scale. A slider or number entry field would be ideal, maybe with a font size preview box below as example of how text will appear. Give users total control by having the option from default (tiny) to HUGE. I have new glasses and still struggle to see it.