Live Arena problem
I've just noticed what might be a potential problem with live arena - there appears to be no loss of rank when you lose battles. Your ranking is based only on the number of wins you've gained.
That means progress is going to slowly grind to a halt and leave you stuck in a grade you can't compete well in.
The best case scenario is that everyone slowly advances up to Gold 4 where everything just stops but you can claim your bonuses. Worst case scenario is that you get stuck in a ranking you struggle to win any battles in so just give up.
We need an option to lose grades in live arena, so that the place can remain dynamic like normal arena. Otherwise this content is going to get stale very fast.