About knockbacks, tenacity and stuns.

With the latest champ releases, displacements are becoming a increasingly common source of crowd control .
As you might know , displacements, such as knock backs, knock-ups , pulls and vacuums(vacui) are NOT affected by tenacity, but using cleanse will make you able to autoattack and use spells again while mid-air.

This has made me think about a possibility: what if not all displacements were counted as stuns?

I'll explain better : displacements could be separated in 2 different cc. A stun and the displacement itself. The stun would be affected by tenacity. Plus, not all displacements would also be stun . They would still inhibit a target from moving , like snares, but they could still cast.

Example: Yasuo last breath is really strong when it prolongs a small flay for 1 extra sec: what if in that extra sec, enemies would be able to autoattack and fire spells?

Of course, most knocks would still have their cc, but this could be a great way to keep displacements in check.