There's no doubt that Deadly Rollick is a fair bit more powerful, but Snuff Out does have the upside of not requiring your commander to be on the battlefield in order to cast it for its alternate cost
Costing three ink or totally free if sung by a character costing three ink or more Let the Storm Rage On isnt especially impressive, but it is incredibly useful regardless of the deck youre running with
The third commander in the set was Kestia, the Cultivator, a commander who cares about enchantment creatures
Zacama, Primal Calamity is also an option but makes for a poor Dinosaur commander as you'd much rather build a Big Ramp deck focused on abusing Zacama's activated abilities
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.) When this creature enters, put target creature card from an opponent's graveyard onto the battlefield under your control