Could you please elaborate on the "chances of Steam showing the game to people?"
Also I'm pretty sure that the way the algorithm works if it doesn't get a certain number of wishlists or purchases fairly quickly after being created, it basically falls off the priority of ever being shown to someone unless they specifically search for it. If you search for certain tags for example, it's not just a highest percentage of positive reviews at the top, lowest at the bottom, it also accounts for the total number of people who have bought and wishlist it when it sorts the list.
So if hundreds of thousands of people buy a game, even if it only has mediocre reviews, steam is rather likely to show it to you, because if lots of people have bought it, it has good odds of being bought by other people, so they want to show you in the hopes you buy it too. On the other hand, if a game only has a few dozen people buy it, even if they all leave positive reviews, it will be very far down the list, because steam assumes that even if it is good, it's very niche, and unlikely worth the time of showing to people, unless they specifically search for it.
So you need to have people show quick and early enthusiasm for your page when it goes out, or the algorithm basically removes any hope of people that don't already know about your game ever seeing it.