I like constructive advice, criticism or your thoughts that are offered in a direct way. 
Fair enough. Here is my lengthy viewpoint as to why you are overthinking it from someone who historically has done just that
Long post. Reading is optional
Internet reviews of anything are at best a guide. There is the element of bias and downright fakery/fraud on some review sites to contend with, but overall UKP suffers far less with this. The punting genre is not entirely free from this though. AW is an example.
Specifically, in terms of reviewing paid for sexual encounters (rather than an electrical appliance, hotel or builder etc) then there is the highly 'subjective' nature of what constitutes a positive experience and which is under discussion here and already commented on by others.
This is hugely variable from the ‘pump and dump’ (surprisingly common) for some men who really do just want to ejaculate into/onto and attractive and frequently younger female, and moves through to the wine and dine overnight GFE and then everything in between.
Then there are the more specialist services eg BDSM and others which are somewhat esoteric in nature and rarely reported on but which SP’s are often asked for on a daily basis. Sometimes these are asked for within what is an otherwise vanilla encounter.
Around two decades ago and during a period when I was posting reviews at a rate of 2/3 a week, I was a great exponent of both encouraging people to review and also guilty of over analysing the format and accuracy of said reviews. I had at that point seen many hundreds of different SP’s of all ages, sizes etc. Internet review sites were still somewhat in their infancy but expanding at a great rate.
A couple of incidents arose which led to a 'Damascus' moment for me. This was the realisation that what I was looking for and consequently the service I was receiving, was in many instances very unlikely to match that received by others. In particular volume and variety was my thing.
I had already posted about some negative experiences of SP's who were highly rated 'internet forum darlings', with large positive feedback but, on the day, it didn’t match my experience. My internet status was resilient enough that I was able to post negatively and withstand any flack from 'fanboys. The latter have historically been a huge problem on review sites. Less so on UKP but it is not exempt. Often in the above scenario I would receive messages from other members saying “
that happened with me also but I didn’t review as I was concerned about the reaction”. More importantly though was the opposite situation .. a positive meeting with SP's who had a fair number of negative reviews.
The most pronounced of these was a parlour walk in punt on my way home one evening. It was my second of the day the first being a little mediocre.
This one didn't bode well either when the SP (with an air of disinterest) began rolling off a number of things she wouldn't do ... in particular that she wouldn't go on top!
Anyway 10 mins into a half hour punt it appeared I had pushed her buttons and all was good and an hour later we finished with her on top!
I duly reviewed highly positively only to discover from another member during the next week, that she had a whole string of negative reviews elsewhere under a different name. Given her attitude at the beginning of my meet I could understand this negativity.
However others could not accept that that negative aspect could be overcome and result in a positive. I was accused by some of giving her a false positive by some punters .. despite my somewhat glowing reputation as a reviewer
These experiences and resultant clarity of the inherent flaws and limitations of reviews meant I adopted a far more relaxed nature to trying to over analyse the whole subject. As a consequence, I reduced my personal perception of how valuable my own reviews were to others and reduced the volume, though not long after I stopped punting completely.
As I said in my earlier post you need to chill out and enjoy your own punting and not become overly concerned about aspects of that of others. This has so many variables that the concept of 'structuring' (a subject close to my heart) proves highly difficult.
