Dunecan, I think your focusing on the wrong target. I take it you want what we all do - more reviews. To shamelessly butcher the line from the movie - Field of Dreams - if you build a more aesthetically pleasing baseball field they still won't come. However you want to package the chapters or link them, it still will never be as effective as building up your own circle of reciprocal reviewers based on mutual gratitude.
You've been on this site longer than I have so maybe I am just wasting your time on this post with what you already know - I'll say it anyways just in case it turns out to help even as a reminder. I looked at your review activity and as I suspected it sort of jumps around not really focusing on several authors for a steady source of reviews. This makes it difficult to give them a reason to come play ball in your baseball field on a regular basis. Quid pro quo anyone?
Now contrast that with KHippolite. When I first started out trying to build up reciprocal reviewers I couldn't go to any chapters in my fantasy genre where I didn't already see a review from him. At one point, I began to think he had figured out how to clone himself and had become a review factory churning them out at a maddening pace. Even with the large quantity they are insightful and helpful so he gets in return what he gives.
Long term reviewers that have been with your work from chapter 1 all the way through are also able to provide more in the way of reviews since they can tie in past concepts from memory that someone jumping in on a chapter wouldn't be able to. This is where I feel you should focus your energy, get going on doing more reviews and keep hitting the same authors to generate the goodwill needed for a reciprocation.
I'll probably be called naive, but I feel at this point in time what I've come to realize is a good group of 5-8 reciprocal reviewers here can find ANYTHING a professional editor can. The reciprocal reviewers I've worked hard to earn goodwill from don't miss a damn thing. Lack or too much prose, information dumping, too much backstory, you name it - they catch it all.
The last thing I'll offer in the way of help (finally he's going to stop his long winded post!) is this question - are you really so sure your first 4 chapters are good to go with that many reviews? I had 20+ reviews on my first chapter and reviewers still found nits to improve. I took a quick peek at your chapter 1 and noticed in a few seconds it opens with a reference to the weather conditions. Greenhorn writers like myself love to fall into that safety net of opening with how the sun is shining, the clouds are overhead, etc. etc. As I've learned from my reciprocal reviewers - pros open with action even if it's not significant versus weather or lighting. Now if I could spot that in 10-15 seconds what else in those 4 set chapters is there to find for a good group of reciprocal reviewers? I think the trick is finding a good writer/reviewer who has room for another versus the ones that are already maxed out. You can only review so many given the time you have, right? To borrow Leonard Nimoy's (R.I.P.) line - LLAP