Cure Light Wounds is enough to add
ish) HP per 8 hours to your healing rate. Since the natural heal rate is pathetic, especialy in the wild, thats significant. Or at least it should be, Im not 100% sure on how the game handles healing while resting.
Of course, theres a regeneration item available not to far into the game, which makes CLW redundant. Although seeing as how theres no difference to the spell table between level 29 and level 30, theres no massive cost to the sorcerors final effectiveness.