Diana should not stay as it is.
She is literally the reason why you removed pre-rework Akali. But she is active at lvl 2 and is insanely tanky. She is a stat-checking machine in midlane. Outplaying her is extremely difficult. Like "Fed annie with flash" tier.
Why did you rework her like this or did not invest time for a actual rework? This champion is never fun to play against and all of it depends on a braindead single target dash. It's the exact same reason you gutted Irelia mid. There are so many reasons why Diana should not exist because of past cases.