The new icons are bad. There are small distinguishing details that are hard to notice at small sizes. The icons need to be more simple, concrete, and recognizable.
Not surprised that many are having a bad user experience with Jira. The interface design and usability is atrocious because it's a tool designed by developers. Developers lack the UX training and thinking that's needed to make the tool intuitive and easy to use.
Recently learned that pigs are smarter than dogs and even 3-year olds. They're also very social, which makes them humanlike. For this reason I don't ever eat pork. It would be like eating dog or human meat.