Falling Icicle
Adventurer
Some of the spells are pretty weak. Abi-Dalzim's Horrid Wilting and Snilloc's Snowball Swarm have already been mentioned (compare them to Sunburst and Shatter, respectively). Immolation is also pretty underwhelming. Flaming sphere deals 5d6 damage per round in a 5th level slot, can hit an area, and doesn't end if the target succeeds on its first saving throw. Flame arrows also seems really weak for 3rd level.
There are some really good spells, though. The new cantrips that do minor elemental effects are a lot of fun. Catapult is a potent 1st level attack spell that also has quite a bit of utility. Absorb elements is a life-saver. Transmute rock is incredibly powerful. Not only is it a snare that doesn't require concentration, it is also an incredibly effective demolition tool that can easily bring down towers, castle walls, etc.
There are some really good spells, though. The new cantrips that do minor elemental effects are a lot of fun. Catapult is a potent 1st level attack spell that also has quite a bit of utility. Absorb elements is a life-saver. Transmute rock is incredibly powerful. Not only is it a snare that doesn't require concentration, it is also an incredibly effective demolition tool that can easily bring down towers, castle walls, etc.