Between Mardu, Mono-Red, and the Night Market Lookout scale of Mono-Black to B/R, there are three fairly distinct decks
I think that having disruption makes the game more interesting: you have to account for it when deckbuilding (dont play a deck with 35 Items if Item lock is popular!), and it offers ways to make the game less straightforward than a simple Prize race
Whether this is enough to build a deck around is up for debate
You can fairly reliably cast Gweena on turn two in other formats like Pioneer or Explorer, with one mana creatures like Llanowar Elves and Elvish Mystic to help ramp up to bigger cards like Craterhoof Behemoth
Definitely a valuable pick-up if you only want the best colorless cards MTG has to offer for pure defensive play to disarm (or annoy) overzealous players
Ezio generates card advantage when your Assassins connect in combat, while Eivor deals extra damage to the opponent when it attacks based on the number of Equipment you control