I burned through 4k gold in the last week or so trying out the new arena. I didn't play for like 2 years, so obviously I'm not as good as when I earned that gold in arena, but the new system is kinda hard. I think the old "going infinite" is easier with the baby arena, 5-0 or 5-1 seems very achievable most of the time, but since that arena doesnt give you any gold, the best you can ever go is even. And the big boy arena, 300 gold is a lot.
Basically I'm butthurt and now I used up my stash and will never return.