The objection people had was because "hot and heavy" implies that the thin person is hot and the fat person isn't. Like if it was called "Beauty and the Beast" or something. It's a really bad way to go about naming a show and strongly suggests that this is a 'haha, look at the freaks!' type show and not one with any interest in actually showing FAs or BBW in a reasonable/positive light.
No, it seems (if you watch the video clip to which I linked) that the biggest complaint was that all the 'mixed weight' couples were thin men / fat women. The title certainly could be interpreted to have the implication that you described, and is therefore another issue that skeptics have brought up. But I think there are other much more interesting ways to think about this title. Firstly: the term 'hot and heavy' has traditionally had the meaning along the lines of "sexually intense, active, or exciting " - see Merriam-Webster.com. This is kind of the impression I got from the show title initially (while also having some idea of the show content). Of course, I agree to being biased toward the more positive implications as an FA, and I certainly would myself feel "hot and heavy" over these young ladies. Another similar positive implication would be: (she is) hot and heavy. Maybe had the title been Heavy AND Hot - this (potential) implication would have been more explicitly expressed. It would be very interesting to hear the show creators / producers explain how they came about this title.
As I posted originally, I was able to watch a sneak preview of episode 1. (Spoiler alert): So far, it certainly is bringing up many of the key issues we know that regularly become paramount in male FA / fat woman relationships, such as:
One guy is wanting to marry his SSBBW girlfriend but dealing with disapproval from his family (especially his mother) and friends. In another couple, the guy has kids from a prior relationship, but she does not and, at about 35 years old she is suffering T2D, and also fertility issues (she decides she needs to lose weight likely with bariatric surgery both for her health and for a better chance to become a mother, and he is faced with this reality). The third couple inadvertantly got pregnant right away after having met (originally connected long distance online). He adores her and is portrayed as wanting to tear the head off people who 'diss' her in public.
Where this all goes (assuming the show lasts more than a few episodes), will eventually tell the tale, but yeah it is best to remain at most 'cautiously optimistic' that it will be a net positive representation of 'our subculture'. Still, I think that even in the worst scenario, they are not just wanting to screen a pure freak show. For example they seem to have worked pretty diligently to find 3 couples to profile that can give an interesting, heartfelt and accurate portrayal. For evidence, I would say this: one of the couples being profiled is all the way from Newfoundland, Canada! You know they could have picked from any of thousands of Southern Cal. couples if they just wanted to conveniently drive a narrative. Seems they really may have been looking for the 'right people' to make this show work...I think about the singer Lizzo, who seems to have become a hot commodity recently - so in that context, this may be the opportune time to make a positive media presence for fat relationships. Fingers crossed......