Hi Dunecan. I don't understand item 1. Are you saying that longer chapters aren't broken up into as many paragraphs as short ones? I must be interpreting that wrong, since the way you break up a story into paragraphs shouldn't really be related to chapter length.
Long chapters do make for a more difficult read. It requires setting aside larger chunks of time to do a single review, whereas short chapters can usually be reviewed in perhaps fifteen minutes. I like short breaks from other parts of my life, so I'm glad the site encourages short chapters. I would think that's true for eventual readers of the complete book as well.
For item 2, are you talking about putting the whole book up on the site for beta readers? I've seen other published authors here take down their content once the book is published, leaving only a few chapters behind to whet someone's appetite. If you don't want to review all of the chapters of someone's book starting with chapter 1, you could simply read 1-10 without leaving reviews, then start reviewing chapter 11.
For 2a, why would you want to deactivate chapters from receiving reviews. It gives you more feedback and encourages readers to review your stuff so they can get points to publish their own work.
My biggest problem with the second draft of my book is that I consider the first half of that draft to be of very poor quality, and I'm getting repetitive feedback about those chapters while I work on finishing the second draft. However, I keep it up, because I occasionally pick up a new long-term reviewer, which I couldn't get if I made them read ten chapters before they could start earning points.
Apologies if I'm misunderstanding your questions.
Dirk