Hey there! I was actually speaking with a couple designers last week about pulling a model together that reduced variance in arena rewards. I'm not sure the reduction in double pack rewards will be worth it, but we'll see and make a decision.

I'm sorry this didn't happen sooner. We made a lot of other changes to Arena (and have already implemented some others that are coming in patches we are locking down now). One thing I don't think we have been great at has been minor updates, historically. There has been renewed focus on that, and our next patch includes things we've wanted for a while, like goldens stacking with nongoldens in the decklist and decklist importing.