As I said I floated the line-height removal idea previously but no-one else came out in support of it so it went on the back-burner. Now that the covers stuff is done and working well it might find itself back in as a candidate one day.
As for the text-indent stuff, I'm afraid it isn't anywhere near that simple. In my original reply to you I had typed a whole paragraph discussing how if I was showered with money I might dabble with a fuzzy logic based approach, which would do things like using frequency and position to infer probabilities of styles being for certain purposes etc. But that might make it sound like I was contemplating attempting it - which I'm not. There are so many issues without aggregating/rewriting the css styles it isn't funny. So I removed the text from my post... but since you persist you get it now
