Thanks to all who responded.
So far as the length of paragraphs is concerned I'm afraid I'd feel quite uneasy about 're-paragraphing' another person's text. To me the division into paragraphs is an integral part of the process of someone's thought; I'd feel as though I was changing what they wanted to say.
So far as the indented paragraphs versus line space is concerned my immediate reaction was 'But I like it that way!' I suppose the current fad for non-indented paragraphs separated by a blank line came about for a reason, but I really don't like that style. I wonder if I could set up a poll to see just how many people prefer one or the other. Or I could do it the modern way for ebooks to be distributed and my preferred way in the privacy of my own reader. And in version 2 I did tell people how to change it to their preferred way.
The cover is great, isn't it. It was given to me as a favour by another MobileRead member, but I don't know whether he would like me to give his name.
Thanks again. You've given me a lot to think about.