Good question. I honestly hadn't considered it when I was thinking of the concept initially. Off hand I would be nervous about removing micro from the pet. Honestly I am all for more micro of pets. It may just be me but controlling both the character and the pet adds another level of play to pet classes. As far as a tradeoff, off hand since my suggestion was to improve the ranger within a certain distance of the pet, the ranger could be negatively affected if they are beyond a certain distance. Maybe reduced movement since they are not as confident by their side or reduced toughness since they are used to the pet guarding their flank. I don't think that it needs to be completely debilitating as otherwise it could be too easily exploited in pvp. The pet stat reduction on druids for example is not really crippling.