I think you can make a case for it over the Sudden Spoiling in some Dimir brews and not in others where this was a blowout as a combat trick or with red mass damage effects like Mizzium Mortars that will shoot them all for 4 damage, you'd prefer the Sudden Spoiling to remove things like indestructible
While I have Lurrus as being one of the strongest, at least from a more comprehensive look at Magic, if I only looked at Commander, I would have picked Lutri, the Spellchaser, as it provided on-demand storm effect
Its adventure, Seek Thrills, lets players mill seven cards and put any card that features an adventure into their hand
As to what characters we might se in the set, Rasmussen hinted that if you can name a character, its probably in the set, even going so far as confirming Samwise Gamgees loyal horse Bill the Pony will be putting in an appearance