This sound disheartening, but it is not really surprising. 4e balanced pets/summons in a similar manner, IIRC, to preserve the action economy. All this was in response to the numerous problems with pets/summoned creatures had in 3e. What really surprises me is that they went for a 'beast master' sub-class at all, given the history of features like this and all. I realize there is some archetype precedence, from Tarzan to Aqua-man, but I would have thought that a pet would be more the Druid's bailiwick.