Snatch definitely works. I've actually been using it as an EX soul ability simply because I wanted better chances of getting goodies while I was grinding SP quests to level break my kamihime and there was definitely a difference in drops between running auto without buffs and doing it manually while also using Snatch a few times. (versus running manually without using snatch).

Even so, things also change over time. Right now I hardly use it anymore and can't say that i feel to be missing out on something.