I see you have an "annotation" feature when sharing your screen. It would be cool if the presenter could see what you are circling real time on their screen. So instead of having to say "click the X in the upper Right, you could use your mouse to either point them to that or circle it. Many companies use that kind of feature for customer service to guide the customer to where they need to go. I understand why actually being able to click on their screen might be an issue, but maybe being able to see a guide mouse might be helpful.