Rewored irelia stole diana's identification
Irelia can reset dash cooldown at lv2 that diana need to wait until lv6

Irelia can reset dash cooldown at lv2 that diana need to wait until lv6

My friend, have you ever played Irelia?
She can currently reset her dash at level 1
No - Diana's ID has always been R resets with Q. Diana can't reset before level 6 because Diana doesn't have her dash before 6, Irelia does, because it isn't her ultimate. Your expectations are off, not the game.
I too would like my main to have her gap closer pre-6. I don't think my main needs her 330% AP ratio available at level 3 lol