2) There are pros and cons to each model.
There's a spectrum. Generally, the closer to full token voting you get, the more decentralized and "pure" it is.
The closer you get to dictatorship, the easier it is.
3) Also, though, left is only one kind of risk--another is e.g. YAM-tastrophies.
and those are also more likely the closer you get to full token voting, because it's harder to patch bugs.