Aw dude he looks 100x better!
His fins are better, his color is better, he has a little more weight on him, the redness is about half what it was.
The HLLE will never improve, he will always have that look, what's important is it doesn't worsen and it doesn't look like it is.
Just keep going.
The instructions say 4 doses, so I would do as the directions say and then observe him for a while. If it gets better you may not need to re dose, but if it doesnt he may need a second round of treatment.
So finish up per the instructions and keep him in QT under observation. Give him a couple more weeks and see if it gets better. Keep feeding him well and keep his immune system up.
Your doing a great job. Lucky fish to end up with you.