imho gold is a bit easier then FGs:
I disagree to this. IMHO, with unupped deck, farming gold is way harder than FG. Problem with arena is that majority are using the usual "Rainbow" decks + SoGs (in other words,
balanced and
boring). However FGs are easily exploited the fact that many of them don't even have permanent controls. In fact some FGs (such as Neptune or Decay) are actually
easier than some of the bronze decks.
Besides the rewards, I think farming FG is less boring because there are actually more variations, contrary to the "dump 12 SoGs, quantum pillars and 6 supernovas" typical arena deck.
As it stands, Arena are not rewarding enough because FGs or even halfbloods are way more lucrative. Halfbloods are way easier than most of the bronze league decks and you can win upgraded cards from them.