Melty Bullet is pretty much in line with other powerful AoE skills present in CS1/2
No way. I can't think of a single Craft that would target all enemies in the first two CS games, much less of one priced at 30 CP. You'd spend 40 or 45 CP to hit an L-size area, and you'd like it. Melty Bullet is one letter grade away from being an S-Craft.
The Kiseki wiki has
Juna's and
Kurt's Crafts too, and they look quite a bit weaker than Melty Bullet and more in line with what the old Class VII used to have.
Cross Break - Class B damage, targets an M-size area, Impedes, has a 30% chance to inflict Faint, costs 30 CP.
Rain Slash - Class A damage, targets a line (S+), inflicts 10 points of Delay, costs 30 CP.
Twin Carver - Class D damage, targets a line (S), Impedes, has a 50% to inflict Blind, costs 40 CP.