I just switched to this model and even if the application works overall, I noticed some concerns.
1/ The resolution being higher, the display is not done on all the screen (see capture)

2/ I have the impression that despite the message during synchronization that the EPUBs are loaded, only the HTML version is available for reading (if I press a long article, the only suggestion is "Read HTML content"). But by looking on the reader in the file system/share/plop-reader/entries-epub the EPUB versions are well present.
If you have information on how to investigate this, I can look into it further or to force the use of the EPUB file.