So I started binge-watching this On Demand a few weeks ago. My ideas to fix the show:
Get rid of all of the "Experts". Clean house with regards to production staff and whomever picks the participants. Lengthen the experiment to 12-16 weeks instead of limiting it to 6 weeks. Stop relying so much on test results and other such metrics. Numbers don't predict chemistry. Pay more attention to physical attraction. Both Sam and Ashley were not attracted to their husbands. WTF? MONITOR AND SCREEN THE SOCIAL MEDIA OF ALL PARTICIPANTS!!! No more of this sneaking around asking friends about your spouse bullshit.
After all of that has been done, do a mixer (someone suggested this upthread). I would do a masquerade mixer or a costume party. Maybe a Halloween party? Everyone has to stay in costume or wear a mask the whole time. Everyone also wears a placard on their person. This placard would have a number or a symbol on one side and some basic information on the other (name, profession, religious beliefs, one interesting fact). They play some games (20 Questions, Pictionary, Charades, Rockband, DDR, pool, whatever), dance, nosh, etc. Then they do a speed date thing where they sit down with each participant for like 5-10 minutes, masks still on, and do a 3 question AMA with each other. At the end of this, each person rates the other participants with regards to compatibility and then the experts or whoever matches the participants for a shotgun wedding in a secret location.
After the wedding, they get back to real life in a house that is already set up and paid for the length of the experiment. Each week should have a theme of sorts and a challenge. Like maybe they compete against other couples or they have to complete tasks or whatever to earn prizes off of a "dream registry". The couples would be allowed to choose their own prizes. I think that would be a good way for the couples to break the ice and decide what is important to them, as well as giving them a way to assess the tastes and convictions of their spouse. The prizes would have to be decent though. Like vehicles, high end kitchen equipment, appliances, furniture, stuff you'd actually need if you were to move into a new home together. No deep discussions and made for TV drama over a Bed Bath and Beyond gift card...unless it's for like 5k lol.
The grand prize could be a real wedding, with an awesome honeymoon of their choosing. All of these prizes would likely require sponsors, along with the wedding and honeymoon. More $$$.
Personally, I'd find the show I described above much more interesting than MAFS as it currently is. They need to spice things up and stop trying to force certain things on the audience. I get that the main appeal is supposed to be millennials and late gen x'ers who are currently interested in serious relationships, marriage, kids, etc but probably don't have those things because it's a bitch finding someone who isn't gay, taken, or crazy, period. But if you're to the point where you getting married without ever interacting with the other person...well, that's a little desperate and weird to me. Marriage at first sight is almost a gimmick anyway. It would be funny to watch the couples fail IF some of them didn't seem so invested in the concept of a perfect marriage and happy family shortly after.
So let's set these couples up for some sort of long term success. You won't get that by forcing them to tap dance around intimacy and shady pasts while talking about their values and faith, all with a camera shoved in their faces. You don't get genuine love and care on a honeymoon with someone you've known for a few hours. Hell, you may not get it with someone you've known for years, but at least you won't be weirded out if the person you've known for years farts in their sleep and brings a deathcloud of destruction above your hotel room.