Accessibility isn't anything new and when working in and on any creative industry product or campaign it should be considered from the off.
I've received a Published Online PDF from a director who's sent a 27-page document that I need to read but as a dyslexic, I rely on using the 'speech' accessibility function built into my mac to allow myself to read this at a fast pace to keep on track with work and my colleges.
You Publishing Online PDF documents don't allow the functionality for this to happen as you can't highlight the text within the document, a basic function on the most text on a computer and online. I think this should be looked at and I'm a little surprised hasn't been considered from the off when creating the platform as a lot of creatives are known to have forms of disabilities.
I hope this is something you look into and consider improving in the next update to this feature as it's SO important in this day and age to make accessibility part of your core pillars from the start of any product or features.
Thanks,
Danny