Some of them are weaker some of them aren't. For Abi-Dalzim's horrid wilting it looks like a high level spell for a necromancer. Throw it in to an area where your skeletons are fighting not-undead. They take damage, your skeletons don't. It's pretty niche, which is not something I personally like in my 8th level spells, but as a sorcerer I can't afford to waste spells known. A necromancer wizard might want this in his book for the day you know you're doing an undead vs not undead fight. On the other hand, ice knife, minute meteors, and the investitures look awesome.

Overall I like many of the new elemental themed spells, and think that the spells are on the same level as the normal PBH spells.

On a different note, has anyone figured out which part of Erupting earth is a typo? It's a 3rd level spell that does a mere 3d12, but has the text "At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d12 for each slot level above 2nd." Don't you always have to cast it at a 3rd level spell slot or higher? But at 3d12 it's pretty weak. 4d12 base would make more sense to me, a higher variance fireball.

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