Say what you want, but Vayne's design is one of the best

She is definetely OP right now and should get nerfed, but dont complain about her design. She is a fun champion with clear strenghts such as her OP late game, great tank shredding, high outplay potential and mobility. She also has clear weaknesses such as bad and unsafe early game, no ability damage, difficult to play, overall risky and vulnerable. Right now her weaknesses are much less noticable because she is op tho.

Examples of bad design would be Azir and Kalista. When theyre in the meta, they do everything better than everyone amd have no weaknesses, as a result they are kept in an almost unplayable state for game health.

So, complain all u want about Vayne but dont compare her to Azir and Kalista as she is nothing like them. She doesnt need her range lowered and Q crit removed, a good nerf to her AD per level should make her balanced.