Apart from the checklists, which people tend to skip, most of it makes sense. Running everything through a pull request is a good example of something which slows down the process but which is still worthwhile IMHO.
That being said, I really dislike when too many of these constraints are enforced by the technology. In coding, like in driving a car, there are times when common sense overrides traffic rules. Sometimes, even in the best and most diligent teams, the build server turns red. In that situation you just need to quench the fire ASAP to keep it from spreading. You don't want to create a task in JIRA, you don't want to create a branch, you don't want to involve your colleagues in pull requests, and you don't want to wait for a hour for unit tests to pass. You just want to apply the simple fix or revert the commit.
And that's why I prefer moderate social pressure over some algorithm enforcing stuff. A good team will know why the rules are there, they'll be professional enough to stick to them 99% of the time, and they'll also be professional enough to break them the last 1% of the time.