First impressions: looks unfinished, needs serious design work. Looks deserted, no sense of community.
Reading tools are pretty useless: autoscrolling gets my eyes tired and the slowest speed is too fast for me. Also I don't think people use desktops/laptops to read books. Better to optimize for mobile.
Progress bar, daily wordcount and all that only annoy me as a writer. It's a creative process, sometimes I write 1000 words, sometimes 0, sometimes I delete 1000 words.
But before spending any time on extra features I think an interesting question to ask would be: if I were a writer why would I choose fictionhub to publish my stories? You want to attract writers first of all, how are you going to do it?