It is strange that everyone is trying to argue a "must read X chapters" what if the novel is literally all lower case words, no punctuation, spelling errors, etc? Oh let's pretend that such novels do not exist.....
The reason the "experience" system exists is because it makes users remain on the platform for longer, helps authors who are trending by forcing readers to leave a review, comment, like, read, etc.
The main issue is that authors who feel that they deserve 5 stars no matter what, will always complain about anything lower which would make WN's jobs much harder. Why would WN remove a system that is currently in place to force readers to interact more, and why would they want to stir the pot with authors who think they are perfect?