You are correct. If you need formatting and such, perhaps using Word and a printer driver is the way to do it. This app is just another way of creating a book and if you are creating one from another format by copy/paste, then it is more time cosuming at the current state. I, for one, have not found it hard to copy/paste 20 chapters of a book but again this is a prefence of mine
The reason why I did this in the first place was, because copy/paste text from websites for example into Word creates more formatting and text-decoration issues than just creating plain text. Word takes all the formatting into consideration and when you paste the content to it, in lots of cases page breaks are messed up, text-decorations and such. Cleaning these up takes more time than copy/paste into this application and let it create constant formatted PDF books.
To be honest, I don't even know how currently I could implement full-features HTML code into this app. You are correct about the formatting lacks, but as I said I will look into this and see what I can come up with.