This show was orchestrated in a terrible way, there weren’t a lot of couples therefore the choices for switching partners weren’t wide enough. Is not fair for some of the participants to just propose before switching partners because it nullifies the scope of the show and sabotage the mechanism of the latter. There is no point in spending hours or days “finding a better fit” for you if the person you most connect with ends up leaving the program and you are forced to make a random choice/ end up with someone by default. There is also no point in leaving the program without facing the problems that in fact brought you there. Therefore, the choice of propose or walk away should be reserved for the last episode.