User face is needed so that you can see "WTF?!" on their face, but that can be somewhat replaced by asking users to utter their "WTF!?" verbally, so I am not to

User face is needed so that you can see "WTF?!" on their face, but that can be somewhat replaced by asking users to utter their "WTF!?" verbally, so I am not too worried about that. What I am worried about is user finger hesitating over an area of a screen only to move to a different area and tap there, or not tap at all. I can't think of a way to fix that problem, but that's the last thing that stands between us and the remote usability testing with no special hardware on the user's side. I have many new users joining every day, I could ask any of them to become usability test subjects. Wouldn't that be super cool? no more multi-thousand dollar setups - usability for everyone! Or better yet, usable software for everyone!