Derek Ryan starts most of his shifts in the defensive zone too, that doesn't inherently increase his value.
Colton Sceviour also forechecks, starts a lot of his shifts in the defensive zone, is physical, and blocks shots fearlessly. He just passed through waivers. Watson has *zero* value to Edmonton.
Puljujarvi is the main piece, not Yamamoto. Puljujarvi value > Connor Brown value.
Yamamoto value >>>>> Austin Watson value. There aren't enough >'s in the world, really. 30 year old muckers with 2 goals literally grow on trees. Every team has a guy in the minors that can do what he does.
OP's logic, I assume, is that Edmonton would have to lose both of the above parts of this trade - and make no mistake, they absolutely do - in order to dump Barrie. Which is also not true.