Max2 Pro (64GB) is expected to be ready for MP in summer. However Onyx is going first to monitor demand for current version in order to decide. Max2 Pro(128GB) is rather kind of rumors. I don't have information about this device at all. External SD Card slot seem to be completely abandoned for future devices
Decisive persons in Onyx top management are tending to put on cloud technologies and quite generous internal storage.
@BKeeper, MDP
Thanks a lot for your reports, your understanding and credits! We are really trying to do our best.
Concerning recent update. It seems you are right concerning issues with purchased apps. It does not look to be related to Play Service but rather to some strange signature issues. The problem is it is hard to test from China since Google is blocked there by national firewall. I also didn't test it for this matter since I don't use purchased apps on ereaders, so we discovered that problem firstly by your reports. We are on it and will fix it ASAP.
@rogerpiano
Request noticed. We will check it