Breaking out of pins is ridiculously difficult, and needs a tweak.

[GORE]

If you are choking someone they have 0 chance to escape it, they get on stamina crit and you can even move them around + you also get one free hand to beat them with, along with the oxygen damage they receive, it is about as easy to pull off as a pin but non antags will more often use pins since those do no damage. Pins are fine as is, escaping them, after it is done, should just require less luck.

Then pins are going to be replaced by punching someone to death again.

If I pin somebody and they can easily get back up I will just murder them or beat them into crit, transport them and then heal them back up again. Seems less risky in case such a nerf goes through.