If browser diversity is important to you I can't see how you would want to support Brave? No matter how good it is still Chrome you support. If we ended up without Firefox, how do you think Brave users would protest and try to force a bug in standard compliance of CSS to be fixed for example? The answer is they wouldn't as for them and everyone else using Chrome it would be invisible. Chrome is cancer like Internet Explorer, except it has now metastasized.

Supporting Brave is supporting a future monoculture of the web with fancy browser reskins and no matter how good Braves added features are it doesn't change the fundamental problem but becomes a part of it, working for instead of against the good of users.