If WotC is serious about giving players a workaround to getting our hands on more wildcards, they surely can come up with something better than this
A lot of players start small (one card, a handful of upgrades) and then print a bigger batch later once the list is locked in
Qualifier Weekend Invitation Players who finish in the Top 250 of Mythic Tier competitors will qualify to participate in the Qualifier Weekend
The inside jokes of Un-sets, on the other hand, make it seem as if the sets are designed for more established players who will get the references, but as players move down the path toward more competitive play, they are less likely to be interested in cards that can't be played in tournaments
Graveyard Golgari cards like Grisly Salvage and Grist, the Hunger Tide excel at filling the graveyard, at which point you have a few options for payoffs