Goldspan Dragon is already a frightfully powerful card for red decks, and it can make that mana ramp with treasure tokens even stronger
Theres a number of challenges in the digital spacethe generosity of competitors, creating a decent user experience for navigating the complex Magic rules, and how fast formats can be solved when more data and communication is available between players (something that Wizards seems to be nervous about)
I trade to offload cards I dont want in favor of cards Ill play with
Many players, for instance, were expecting us to reprint a cycle of enemy fetch lands in Battle for Zendikar (as they premiered in original Zendikar), but they were too problematic in Standard along with the allied fetch lands from Khans of Tarkir
Sure, you exile it, and that's sad, but that's three versions of the card if you sacrificed it, and two if you discarded it to something like Faithless Looting
It taps for a whopping 3 colorless mana, but only for artifact spells