@cryzed -
I'm not really inclined to change FFDL to use your APIs for ffnet and fpcom. If you were offering code for a new site, or significant new functionality, it would be a different matter.
As for review count, I don't see that the value is worth the effort. It's going to be out of date most of the time. FFDL has 25+ different adapters for different sites it would have to be added to. And if FFDL collects review count, why not the recs/favorites/hits counts that many sites have, too?
I've added it to the 'wishlist' of future features, but I don't see it happening any time soon.
(BTW, to counter the argument that review counts could be updated everyday: I
strongly recommend everyone use email notices for new chapters, and to
not poll all your stories every day for new chapters. It inflates hit counts and wastes bandwidth on the fanfic site. We can only do this as long as we don't annoy the sites enough to block us.)
As for changing the appearance of the output, looking at your screen shots, the only differences between Lemon and FFDL output I noticed are that Lemon doesn't put commas in the word count and it centers the TOC entries. And, predictably, I like the output from FFDL better--because it's the way I like it.
Have you looked at FFDL's personal.ini settings? Specifically, the titlepage_entries, include_tocpage, and output_css options? There's already a fair degree of customization available. (Fair warning--FFDL mobi output doesn't support output_css. In fact, FFDL mobi output is only one step above deprecated. I strongly recommend epub and conversion.)
If you have specific requests, I might be able to add some additional markup to the title and TOC page output for the CSS to influence.
Thanks for your interest.