There are SO many usability issues with the new JIRA that it has become virtually unusable by a project administrator. The little confirmation modals cover the most needed navigation on issues (so if I create a sub task I now have to dismiss the confirmation before I can create another sub task), I can only see 5 projects in my recent boards and I'm managing a project with 80 projects inside of it so now I have to constantly go back to the all boards, when before I could see all the ones I accessed in the past several weeks. The search no longer finds anything if it isn't an exact match. I search for 727 and it says nothing found but I have an issue called 727 and it couldn't find it.
The layout is horrible, great for tablet users but most people using it are using computers, it's so unusable having the left bar and no longer having everything accessible at the top. Now everything is many many clicks away and for usability you are supposed to keep things within 3 clicks. Now I have to click 5-10 times to find something.
I want to get rid of this "new and improved" experience and go back to the old JIRA. I'm a usability expert, I was Google's lead UX/UI Designer and Developer, and while you think you've made it more usable you've seriously reduced productivity for all managers and project administrators. You need some very serious usability testing and training as the new interface is not usable and is not intuitive. Your changes now make your users feel stupid, which you are supposed to avoid at all costs.
I'm severely disappointed in Atlassian for forcing this update on people without thorough testing by usability experts -- and more importantly by people who have been using JIRA for years.