Don't know what happened to my earlier reply to this, but I agree with what others have said. Any bruising is likely a minor symptom & the state of the horse's feet aren't good. There are many potential issues that arise from high heels. I too would advise removing the shoes, at least until such a time that the feet are healthy. I don't believe shoes are *generally* good for unhealthy feet and there are generally better alternatives, such as boots, to provide protection & support when necessary.
As there are so many differences of opinions, and even in the realm of 'experts'(ie vets, qualified farriers...) there is a wide range of knowledge and opinions, depending a lot on whether these 'experts' are indeed up with current research, etc. So I believe your horse's best bet comes from you educating yourself(please note, not assuming you know nothing) as best you can, in anatomy & function of the hooves, and the principles and factors that effect hoof health. That way, you can better weigh up the pros & cons of different approaches and make informed decisions about management. To that end, hoofrehab.com is a great, well researched place to start.