Brassia roots...are these good or bad?

[Cinderella]

The following are pictures of my unpotted Brassia, which I purchased a year ago. I think it was potted in volcanic cinders ?? and I should have repotted it last year!

I have a hard time telling with oncidiums if the roots are viable or not. These roots are light brown and did not green up when I soaked it for 15 minutes. In addition, the bulb pictured has some brown on it. Does this need to come off?

Help, thanks!