I don't know that there is a specific rule against discussion, it just seems that the site has gravitated more to people either uploading videos to be downloaded and/or people posting either requests for things they want, or lists of what they have to trade. I appreciate the individuals who have uploaded, and I understand the motivations behind the other posters, but I don't believe there has actually been any real discussion per se. I'm open to that notion, but that's for the moderators to sign off on, and I wouldn't want to take up a large amount of space on their forum with something they aren't okay with.
If you are looking for reviews, type "Pro Style Battle" into a search engine, and you should be able to find a Wiki-site devoted to same, which has links to companion sites, including a forum which includes (biased) reviews and summaries of some of the videos - but it is in Japanese. Battle is/was the primary distributor of the videos, and most of the "real" wrestling videos come from them. From what I've seen their talent comes from gravure and JAV models, but they often are extremely capable of putting together a decent match. I'm not a native Japanese speaker, so I can't give a fair assessment of their "acting" or delivery, but it often looks convincing. The more recent the video, the more polished the match work is likely to be. YUE is a stand out performer, and I would recommend anything she is in. The other video companies can often have surprisingly good wrestling in them as well, but if the video is being sold as porn, it's going to lean towards where the money is.
I hope this has been some help, and answered a few of your questions. I've tried to be as brief and concise as possible out of respect for the moderators.
