Last I checked, healbot is significantly better than it used to be.
There should be a way to scale the frames to be more suitable in size. Also a way to make the frames more/less transparent. Just off the top of my head, those would be immediate "fixes" I'd look for.
Hard to really comment too much on what you have as you didn't post a screenshot. If nothing else, hit print screen, drag up the pic out of the screenshot file, slap it on here. That'll be the easiest way for anyone to really give you constructive feedback.
Also, check the Healing Discussion Forum, and the UI/Addons Forum. Check the stickies.
No one tanks in a void.........