Absolutely.

What's the point in playing a tank if you can't control the battlefield at all?

And it feels really dumb and cheesy circling or jumping behind enemies to "backstab" the same opponent again and again.

Jumping needs to be a part of movement and trigger aoo's.

Disengage needs to be a full action. Let the classes that are about mobility shine and do it as a bonus action. Spellcasters also have ways to disengage (Shocking Grasp, Misty Step, Thunderwave...) they currently don't need because they can just jump away.

And it just looks dumb when everyone is constantly jumping around and shoving people.