My guess, and this is just a guess, is that Snatch is helpful, but only by a small degree. Since everything is RNG people can get a good roll or a bad roll which is why there are so many different opinions on the matter.
It's probably something that is 'nice to have', but not really 'needed'.
That being said, it would take someone like me a long time to get D'Artagnan since I went straight for Mordred. I'd need 1k soul points to unlock her which feels like light years away right now. Not that I'm unhappy about that. I happen to really like Mordred's abilities. They have been very helpful in boss killing.