With the caveat that it's limited use, I quite agree with you. I always prepare spells with the intention of casting them... but in the end, I smite Smite SMITE! more often than not. And my DM has us on a homebrew where the baddies are mainly undead, so I feel I've been holding my own even with a Barbarian Berzerker in the party.
Heh, 2nd-level the paladin smites undead for 4d8+3 assuming a longsword and +3 Strength and 3d8 of it is radiant, so double damage. As a DM I'd totally describe that as the undead exploding in a shower of sparks and light
