no, they just don't commercialize gold bonus token for the moment, gold is still functional, you can buy packs, boxes, decks and avatars with gold, individual, non limited/legendary runes can be bought with shards that you get sacrificing other runes.
yeah I was trying to create a amp fire bg with gold but got frustrated with the core packs only giving rares I speak a few days trying to cp a bg but halfway through i realised i was either missing stuff or realization that it just wasnt viable so i stopped now trying to decide what I should go for, i have skywing taint theme on my sl but got absolutle creamed by a mobi hungry dead split bg in ranked and decided its time to rethink and make a new bg.