Thanks for mentioning this, because it may have been nearly a year since I took a serious look at BGs, and improvements have been made to improve the mobile play experience.
Although I still find that it takes three to four times longer for actions, such as refresh, hero powering, resolving spells, etc. to take effect on the phone as compared to playing on a PC.
I play on an iPhone 8 Plus.
Anyways, your comment prompted me to play BGs again, and I have been having a lot of fun learning how to play them again.
Over the last four days, I have gotten 15 wins and many Top Fours, and I have a ton of things to learn still.
For anyone new to BGs, I advise reading all the cards first, including the Darkmoon Faire prize cards/spells.
Also, checkout Nicholena’s YouTube videos from the last month: