From my perspective the game is in a really good spot now and would be one of the the gachas I would recommend to play, there is still some caveats, but it's a F2P game/ gacha and in this type of game there always will be caveats. Pity in all banners is a huge deal and still is hard to believe they did this move.
About selectors , while I don't think it would break the game if it's a rare thing , normal 5* selectors aren't necessary anymore, because obviously the pity system is in place, I'm sure they will rerun old banners and everyone will have a chance to get the hero they like (unless it's a collab hero not sure about these). ML selectors , I'm not sure here if they are necessary, it feels very early in the game's life to have something like this for characters that are supposed to be very rare , but I might be biased because I don't care about them.
About complains , it's a normal thing , people have the right to express their discontent , yes and people have the right to disagree or agree with the complain, it's a discussion forum and opinions might be divisive about certain topics, what can't exist is trying to shut down someone and to stop them to express their opinions (unless the opinion violates the rules of this place of course) ...