Yeah, screen sharing is a total game changer for that. I had the same blurry log problem as @hugo_ellis until we just started sharing the host's screen. Watching them scroll through the actual code or terminal on their machine is so much clearer, no guessing at the blur. It cuts out all the lag from trying to watch a stream of their remote desktop.
Wait, you can actually see what's happening on a shared screen during a debug session? The lag is always so bad for me that their cursor jumps around like crazy. Trying to follow a fast moving log file or watch a variable in real time is impossible. It just turns into a blurry mess while everyone guesses what just flashed by.