I'd be happy in general to see more variety in pets. A piercing type would be nice to have. More support types that have area abilities that work on the party like Lucky Lulush, but expanded into areas such has party buffs. I'd also like to finally see a Black Mage pet. Not casting magic but monsters as pets who have a variety of elemental based attacks (i.e. Wamoura, Ruszors, etc.) and are given Magic Attack Bonus. Already broke the mold of charm-only pets with Crude Raphie. Might as well make things more interesting. I think personally it wouldn't be stepping on the toes of any other job and it would overall facilitate more use out of Beastmaster in a party setting if it is done correctly.

So after doing limbus and checking wiki today, i notice we have NO piercing "attack" familiars to use.

SE apollyon - floor 1
Weak to slashing, immune to blunt.

Ok almost 90% r slashing pets, and bst axes r slashing, no issue

Floor 2
Weak to piercing, immune to slashing.

Here is my issue,
With bst main 2 weapons being slashing type (axe/scythe); i can not help at all and on this floor i have to use a pet with blunt dmg type, which slows things down and u r timed. And wow, dont let the mobs link with the shared hate or else a normal 2 min mob becomes a 10+min battle(2hr-ing does help kill faster but not my point)
Regarding Limbus specifically, I always use Flowerpot Merle for the 2nd and 3rd floor of SE Apollyon. Wild Oats counts as piercing damage and since the 3rd floor is blunt damage weakness, I swap to using Head Butt. To contribute on the 2nd, I just use daggers with Evisceration to speed up kills.