In old UI I could at least open the Create Issue form in the new tab. In the new UI it's not possible anymore, Create Issue form shows up only as a modal dialog. The underlying page remains open and I have about 5s to click a little popup. If you didn't manage or got distracted - have to look for the issue somewhere else which is usually like 3-5 extra clicks, especially if you were navigating the board when you decided to make an issue. In my opinion that's not a very good user experience.