As I already stated in my blog post, even with Brave, Goolag still has the power to make them dump V2 by making it as much of a hassle to implement it back in again and again for example.
The only way out in the long term would be to fork the browser, and just continue development independently from upstream, but unless they master the entire Blink soyce code (good luck with that!), I won't see them doing that anytime soon.