I'm not a fan of it because the ground creature decks can get much bigger than the Witch and the Insects can offer, while against Delver decks, as their entire threat-base flies, and the insects essentially read "can't block
While there are a ton of not-so-great reprints focused more on the Limited experience this set offers, theres also a ton of heavy hitters to help satisfy the sky-high price tag
WotC suggests that big creatures that are hard to interact with are positive additions to their environments. They might have been thinking of the Avabruck Caretaker / Hollowhenge Huntmaster when they said that, but Im not sure anyone would agree in the case of that card
For only four ink, it can be sung by a character to deal five damage to either a location or character
And it has the activated ability that gets it close to pack tactics on its own
Nazgl Battle-Mace Look at all these Eldrazi with annihilator