i really like the new sistem of rewards and i think what your guest said was right, prices for rent are going crazy speccially in gold foil cards and related to not getting back your DEC well is a risk remember that tomorrow you can get a legendary or rare gold foil and you recover all your dec. im adjusting my battles to get the most chest in 1 day and skip the next day to recover, so i make 20 chest and believe me rewards are better i dont know why.
look yesterday reward and i will leave a screen shot of my EOS too.good luck to all.