Then I suggest you phrase it more clearly since you replied by giving a reason to someone stating that no changes are needed since the satchel is no OP.
If you simply want to point out differences between different snares: This is no the topic of this discussion.
The point is of this thread is not if satchel are Op either, it about the upgrade and CD. Being UP or OP does not really have much to do with their CD on upgrade.
AT satchels are badly designed as I have posted in other threads, should the start on cooldown? Imo that is the least of their issues.
But I was responding to specific point that "why Penal in particular should have a cooldown" and since there are not like most other snares they are a particular case unlike other snares.