Full disclosure, I am visiting this topic from the perspective of a melee hunter who works in the theorycrafting circles for the spec, and while my opinions are largely reflective of what I foresee for Melee the bonuses are identical for ranged which is a problem in it’s own right. That being said, I’m predicting very similar issues for them if not they’re not identical just based off of that alone.
I believe the bonuses, as they stand right now for melee, need to be entirely revisted for Melee hunter for Phase 7 if they are not on the to-do list already. To start, the 2pc bonus does not do anything for Dual-wield builds which was an issue already present and addressed in T2.5 that shouldn’t have to be retread again. The 4pc and 6pc bonus, which are identical for Ranged and Melee only limited to their respective niches, are going to cause extremely boring and problematic gameplay loops once in full Naxx gear.
Hunter - Melee 4P Bonus: Your critical strikes with Strike abilities and Mongoose Bite have a 100% chance to reset the cooldown on those abilities.
Hunter - Melee 6P Bonus: You gain 1% increased critical strike chance for 30 sec each time you hit an Undead enemy with a melee attack, stacking up to 35 times.
Raptor Strike and Mongoose Bite, with Savage Strikes from the Survival tree, are already sitting at about a 70% crit chance in full consumables and world buffs. With the 6pc bonus, this is bringing both of them up to 100% crit chance which is going to lead to the rotation consisting of nothing but spamming Raptor Strike and Mongoose Bite. They already have built in CDR resets through Melee Specialist, so you will get to that guaranteed crit chance incredibly quickly.
This potential rotation, which can be even further amplified by the shoulder enchants and Lone Wolf, is almost identical to what melee hunters used in Phase 2, which is a severe backwards development in my opinion for a spec that has come a long way from it’s one button rotation roots to start off SoD.
There are many other very powerful and more interesting sources of inspiration to draw from, such as a the wildily requested Beast Within that debuted in TBC or potentially Go for the Throat. If DoTs are on the teams minds, you could lean into that by giving pets a Deep Wounds effect, making Raptor Strike apply Serpent sting, cause Rapid Fire to increase DoT damage done during the duration, etc.
This version of hunter has been one of the most fun experiences I’ve had with the game in recent memory, I have been extremely excited for Phase 7 and reading those set bonuses as-is was incredibly discouraging for that gameplay and I hope the team will reconsider that direction.