-Can command primarily nocturnal creatures, or creatures active during the night.
That works for me.

-For shapeshifting, he can assume the full or partial form (partial meaning claws, fangs, etc.) of animals that he can put under his command at any time (bats, wolves, spiders, etc.) , becoming a swarm if his mass requires it. Limited to night time.
Sounds good.

-Baseline strength and speed are only slightly above a very powerful human. He can empower himself to full vampiric levels by drinking blood, but abusing this can put him in a frenzy.
Looks good. I'm assuming he loses control and the ability to really think intelligently, making him susceptible to tricks when frenzying? Much like a beast?

-Regeneration remains superhuman, but can still be amplified. Baseline is recovering from a "mortal" wound in a few hours. Empowered is regrowing limbs in seconds.
Regrowing a limb in general seems too much, I'm good with the baseline and would prefer to have it where empowered is instead he regenerates major wounds *short of heart piercing and loss of limb* in seconds.
EDIT: Mm, here's another thought, since if he's in a blood frenzy, as the amount of blood he drinks increases, he's tougher to hurt anyway. Ignoring the regeneration *which he still has*, wounds are harder to inflict. It'd could be fun to put him in a situation where he knows he's going to get close to the edge of a frenzy if he keeps going, but he's gotta do it to survive, but doing so could push him to attack the one he's trying to protect anyway.

-Adding a weakness to and phobia of fire. Weaknesses manifest as powers are amplified by blood.
I love this one, the stronger he gets, the weaker he becomes to fire. Very good.

-Potentially adding vampiric stealth and charisma as empowered abilities.
Unnatural stealth to his movements seems fair, especially if his strength is indeed only a bit above a human's. Having him be more ambush than straight up brawler seems appropriate.
Charisma are you talking about physical attractiveness or his mannerisms, because if it's mannerisms, that's entirely up to how you RP and play him off. Something he says could easily trigger something about someone's past or they could simply not find that charismatic.

A strange physical beauty to him would be fine. That's not really a power or weakness, so I don't have any problems with it.