I am playing a Battle Sorcerer (currently 7th level) and he has Acid Splatter. Its not a spectacular feat, the range makes hurts its usefulness as does the need to always take acid spells to boost it, but it is a decent one especially given that he gets fewer spells per day than a standard sorcerer. The bonus to caster level helps, and being able to do something when he starts getting low on spells is useful, but for the most part the only time I think it has unbalanced a combat was against a troll. I do think it retains its usefulness at higher levels becuase as a ranged touch attack it makes hitting those high AC/low Dex opponents easier.
Overall I am in favor of the "I can do something special every round" philosophy of game design and would like to see options for every class.