Prior to the stills displayed in the post, when Boo was doing the feat in question, Vegetto stated something along the lines of "If I don't stop him, the universe will be crushed by multiple dimensions!" The wording of the statement would suggest that Boo himself doesn't have the raw power to destroy dimensions, but rather via the chain reaction of the Dimension Cannon's hax. In other words, to say Boo's power is Universe level from this feat is the same as saying a guy who demolished a building with dynamite is a building buster because he pulled the switch.
That, and with this scene being retained in Kai and Super's anime seeming to follow Kai's continuity (and to a lesser extent some of DBZ's such as the filler of Ginyu using Body Change on Bulma), I doubt the staff would treat Boo's power in this state as truly being Universe level when SSG Goku and Beerus' display of such feats was to emphasise the idea of them having reached a completely different tier of power from anything prior.