Getting chests in arena is a good chance to get nice cards, but they seem so high to reach for the poor drop rate they have.

We have now a single Scorched Chest at 15k, giving mostly Flame Witches and Fire Elementals. We recently had two arenas with chests only up from 8k, filled with Blessed Statues and other feeders...

Either giving more chests or improving the drops would work. A good supply of stones or a 5* at least, or maybe spreading the chests at 3k, 5k and above. It´s extremely disappointing to open one of these high milestone chests to get only a 4* feeder or pots. Many top players have left this kind of arenas because of the bad drops, and are heading only for Super Arenas coming back.