I see no complaints about him on the internet regarding his alternative practices activities... a good thing. However, something the cult will no doubt bring up is some unrelated but questionable past activities which are noted in multiple places on the internet.
I'm going to lay out the facts that I came across, to offset any future distortions and black PR that the cult may do on him regarding his previous career. Sheen is a also a former Certified Financial Planner who changed careers to alternative medicine. His career and writing about Financial Planning are referred to in his wiki page
https://en.wikipedia.org/wiki/Brian_Sheen
However, his license revocation is not:
Certified Financial Planner Board Board of Standards revoked his CFP license 20 years ago
http://www.cfp.net/about-cfp-board/ethics-enforcement/disciplined-individuals-by-state
... further research shows that the above as in regards to activities in the 90s that resulted in his being censored and sanctioned by the SEC resulting in his broker license being suspended for a year by the SEC due to regulatory violations, and then not agreeing to ( or being able to comply with ) the financial result he tried to appeal and lost. That his license was later revoked for the very non-payment of the fine levied in that matter first publicly noted in March 1995 in this SEC News Digest:
https://www.sec.gov/news/digest/1995/dig032095.pdf
FINRA Report (Financial Industry Regulatory Authority, Inc.)
http://brokercheck.finra.org/Individual/Summary/843742
I do see a changed person, doing work he enjoys, and helping others. Non harmful non-medical means for helping for children and adults with ADHD is a good thing. I didn't look much into all that he works on with patients but as long as no harm is done.. I won't knock it or him.
He's a father and wants to do what he can to stop disconnection. Despite his colorful and varied past, I say we show some support for him. It takes money, effort and guts to sue Scientology, regardless of the win or loss in the end. I suspect there is more to come from this lawsuit, more to help expose Scientology. Brian gets my support on this