It's best not to judge the US version by the first one or two episodes as in this decade at least the editing has sometimes fallen short in early episodes. Opinions may have been clouded by the previous season not being so popular as well.
It's definitely feels better for me not knowing what happens in advance. I know an argument of spoiler people is that it's fun knowing what happens and working out how the storyline is shown from that perspective. But you can always have that viewpoint on a second viewing later, to ditch the suspense of not knowing on first viewing doesn't make sense to me.
Spoiler people definitely depend on leaks, that's harder for them to get in a more closed environment, which is good for the vast majority of the audience who don't want them. Apart from contestants there could be leaks from the crew or locals working alongside them. Massive fines for leaks (such as revealing contestants early, which hardly seem serious), might bring bad publicity if anything, so that might be more a posturing threat than an actual likelihood.