I agree with everything you've said about Meio Mundo.
I've been there several times and just can't get into it. The kinds of guys that are there (twinks, little boy looking guys, average looking, regular guys) are not my thing at all. These are the types that often hit me up on social apps like Grindr and bars in the States, and I'm not going there to have what I could easily get on any night out in the USA.
One reason why I rarely post here is because it seems the overwhelming majority of posters are posting about Meio Mundo over my preferred 117 and Pointe. Many posters here seem to poo-poo over Pointe because they don't like muscle guys. But those generally are my preferred type. I wish there was more info about them here, as well as photos. Although I do appreciate the info given here, it is a little skewed to the posters' tastes, one must admit.
On my last trip (May), I directed to Meio Mundo a good friend who travels with me often but this was his first time in Rio. I really thought he would like MM since he tends to go for the thinner, taller, younger guys. To my surprise, he did not like the place, and spent the rest of his trip visiting 117 and Pointe,