Thank you, we're glad you enjoyed it! Under the Moon isn't under the lead translator of OGE and so isn't held to any kind of time constraints. I would have to say there is a high chance it won't be getting a full release, but still a small chance if the translator who wanted to pick it up and joined us decides to finish it. OGE is mostly acting as support to the translator of that project.
Yes, all of the games we were deciding between were ones we have personally found to be very enjoyable on many different levels.
Sanzen Sekai Yuugi is an 18+ otome game with a very strong bounty hunter female main character. It is one of the more highly plot focused 18+ otome games, with the hentai scenes being more story based and romantic in comparison to other 18+ games. If you like sci-fi, action, and cop stories with strong female main characters you would like this game. Some of the Japanese reviews said it lacked in romance, but for the way the plot is it is satisfying enough. It will probably be the more challenging choice of the 4 because of the constant scifi terms, but we love a good challenge! Also, on Amazon.jp it has 4 out of 5 stars from 15 reviews.
Sanzen Sekai Yuugi would be the 18+ game we would consider. It is one of the few that the entire team enjoyed/ is interested in.
The answer to your final question is a little more difficult. The simple answer is that we are neither against nor for it. It just really depends on the situation and the circumstances. However, we are very happy to see that the otome community has grown and quite a few commercial games have been published since we released Starry Sky~in Spring~. We hope that all the groups that are able to pursue it professionally do well, since in the end what we have always aimed for is bringing more exposure to otome games and to help the fans enjoy them.