This means we get to deramp without sacrificing our strategy, and a 1-cost Character can become attackers, threatening the opponents Life cards
This creates a ruthlessly efficient strategy of attacking with cheap, evasive creatures to enable Yuriko and drain the tables life totals
Exiling cards from your graveyard is likely to be the preferred method of crafting (for most decks), which means crafting isn't something you can do on the first or even second turn
The Asia Pacific Land Program only lasted for one set (Tempest), making them one of the rarest basic Swamps you can get
All in all, Pinnacle EmissaryPinnacle Emissary is a good card, no doubts about it, it just doesn't rank any higher because it's hard for me to imagine it as a first or second option in the same slot
Using so many resources for that may kill the deck, but that isnt a reason to avoid the ban