Does the UA class variant Ranger Companion Options gain the Rangers proficiency bonus as per the PHB Ranger’s Companion?

It is unclear to me how to reconcile the UA enhanced class variant Ranger Companion Option with the Beast Master Ranger’s Companion feature rules in the PHB.

Specifically, in the case of a 5th level ranger who chooses a Beast of the Air, would the Ranger add her proficiency bonus (3) to the beasts AC, attack rolls, damage rolls, saves, skills?

If yes, then what would the resulting stat-block look like for a Beast of the Air companion for a 5th level Beast Master Ranger.