I mean, cantrips rarely hit (for Gale and Shadowheart at least) and when they do, they don't add any bonuses to damage (for now at least).
The only good cantrips are Mage Hand (for shove attacks on all the creatures that go for high ground) and Guidance (use it if you know you're about to head into a convo or attempt to steal something).
Obviously Eldritch Blast is great, but that's kinda the only thing Warlock has: Hex + Eldritch Blast.