Maybe Saturn is a bum with no named attacks, just his broken regen and his ass cringe tentacle attacks.
No, it's too early to count him out, IMO.
He literally unveiled a new form for fighting last chapter and only had a single panel of action so far. I'm sure before that, people were just saying he had nothing beyond his eye hax.
People thought he would get erased by a yonko attack after the Kuma punch, only for him to get right back up after a dawn gatling. Luffy can't put him down at all this chapter.