[Bigo2]

So many angry people... Reading your blah, blah, blahs, it seems to me that according to your opinion the original creators of Sigil must have been..., because they put something in the program which sucks, sucks, sucks, sucks, sucks all the time... no I don't intend to say anything bad, because they weren't!
I never suggested to use the Book View for serious editing. But some editing was handy:
E.g. Some books have all the text merged in one file. If you clicked on it in the Book Browser, in the Book View you could quickly and easily create files for each chapter just scrolling and putting the cursor on the chapter name and do the Ctrl Enter...
Or in the Book View you could scroll quickly and easily to change the headings...
You could list quickly and easily through the book and view fix little things without worry damaging the code, e.g. occasional space or coma or bold/italic. Nice features.
I know all these things can be done differently but...
I tell you something: Most of us probably use Calibre. As you know it has pretty decent EPUB editor. And also AZW3 editor! It's a serious competition for Sigil. There is no advantage now when in Sigil the Book View is gone...
Why not to use Calibre products for everything?
If you want to compete you don't downgrade your product!