I'm pretty sure meteor is the only real outlier, it offers no obvious synergy with the sorc tree or theme outside of being a high cost spell.
Meteor doesn't necessarily have the worst tree, but as an exclusive skill it has by far the least to offer. Your options are essentially damage or a limited/specific buff in craterborn. It's almost the exact opposite of chtonic fissure in a lot of ways.
Thematically i think arcane ascendance makes far more sense as a class exclusive skill, it interacts with mana cost and the nature of buff skills fits exclusive skills much better imo, they're usually "forced" picks in arpgs while not necessarily enforcing a specific playstyle or dmg type.