Helix strikes me as a project that needs to work on its contributor ladder.
The maintainers have a strong vision, which means they need to refuse a lot of PRs to keep the project focused. Having the courage to say no to more feature is one of the key aspects of this product.
But there are also too many PRs for them to review, to the point some become stale for months if not more. The maintainers should work on onboarding new maintainers they can trust, to spread the load.