I've seen this play out many times, but only once was it good. BUT ONCE I did see it be good. It was interesting enough that I took the mental notes of why it worked. Huge asterisk because there are still pitfalls around the team having a single point of failure, but that's an issue with many other modes with mixed skill.

Anyhow:

-The whole team was bought into it as a working mode

-There was a QA embedded directly into the team

-The bulldozer was forced, but willing, to routinely re-communicate plans and issues

-The bulldozer became good at proactively communicating "hotspots"

-The bulldozer was not allowed to do estimation, the surrounding team did that.

-The bulldozer agreed to be obligated to prioritize helping the team if they had questions (I think this is what helped him to be so proactive... He was incentivized to avoid this scenario of confusion entirely)

Anyways... I still don't recommend it. But, assuming people are into it, I think there are ways to arrange the right individuals into teams in a way that minimizes the major pitfalls. I'm a pretty big fan of letting/helping teams self-organize into whatever their efficiency maximum is.