Diana's rework kit has the same issue that old Akali had
Riot Mods did it again. Talk about a gameplay issue that they dont like and it gets Deleted. Thread had good discussion and was positive up votes.
If you are a squishy there is no counter play at all. You cant out run and once in range its death in under 0.5s
This is what Old Akali was and why she was reworked (tho Riot still failed on that) Diana is the same. Her Kit use to be ok when damage was lower because you could out play but not with today's damage.
The issue is that you cant get away. She can leap on you and delete you and her E leap has resets (she is old Akali in this)