I don’t know much about e ink devices, but if you want to switch to android with a bigger screen then I would recommend Huawei docomo dtab.
It has a 8" screen so reading and writing is quite easy, I am not sure if new dtab (if they are making them) have Google play, but mine does.
It is quite a decent device and very economical. You can find more details about it on the internet.
Forgot to mention that they are strong too! I dropped mine countless times (it doesn’t even have a screen protector), the height ranging from 1ft to 12ft and it still works like a charm! (screen has cracked but it works)