I actually took the time to check PS4 store - Eternal Soldier 4/5 stars; Alien Myths 4,5/5 stars; Wardog Fury 4/5 stars; Ultimate edition DOESN'T HAVE ANY RATING YET.
At least on PS4 store there are lot of games that are not free to play on FREE TO PLAY section: demos, just some parts of online etc. The worst I remeber is Fortnite - those F-ers put the game in Free to play section months before Battle Royale came out. I downloaded it then and first thing I saw was "Hi, to play the game you must buy one of these packs".
Mercury has actually put free to play mission in Free to play section so you can play it and decide whenever you want to actually pay for any more missions or not. The only bad decision from their side was to not add any print screens or trailer to Eternal Soldier and they did it now.
Sorry if I had mistaken the PS4 ratings, I play RotBP on ps4 and recall the ratings being quite underwhelming compared to the majority of other games on there. My post really came after seeing the Xbox one rating for 'The Ultimate Edition' sitting slightly above 2 stars that prompted me to bring this up. I agree with pretty much all of the points you all are bringing up. Hopefully Mercurysteam will do everything they can to turn this around.