Right now, the hunter str/con pet buff is, for all intents and purposes, worthless in RvR, because Hunters can't keep Stealth while letting the pet fight(devs say it's intended), and when they are jumping a player or getting into a fight, they don't have time to buff the dog. So they don't have time to prepare the dog, and everyone knows that it's a hunter's pet because of how it looks, it's not like an ice-strider or frore lich - it sticks out like a sore thumb. It has no unique abilities of it's own, like stunning or diseasing or being able to heal the user or nuking , so currently, there's no benefit to summoning it ahead of time to prepare for a fight. This makes the buff worthless.
Considering the amount of points one needs to invest into BC to make it worthwhile(the last pet buff is at 41 BC), and considering that BC doesn't have a lot going for it in the first place(AF+Dex which are barely better than pot except at the high end, and timed flight, which isn't as useful as it sounds), I think this would make the dog more worthwhile and make BC more valuable as a whole, rather than the dog just acting as a throwaway engagement modifier for the hunter(the buff actually does make the pet quite a bit more durable - problem is that we can't use it in any practical situation).
Considering the amount of points one needs to invest into BC to make it worthwhile(the last pet buff is at 41 BC), and considering that BC doesn't have a lot going for it in the first place(AF+Dex which are barely better than pot except at the high end, and timed flight, which isn't as useful as it sounds), I think this would make the dog more worthwhile and make BC more valuable as a whole, rather than the dog just acting as a throwaway engagement modifier for the hunter(the buff actually does make the pet quite a bit more durable - problem is that we can't use it in any practical situation).