That isn't to say there aren't illicit players to be dealt with. The issue arises from the fact any player can call out any other player, framing them through game quirks, actual computer/network issues, and so on. No matter how "obvious" the individual might be, only the developers have the tools to properly investigate and assert certainty over such cases. Meanwhile, depending on the form of accusation, a player could bring unwarranted negativity on a legitimate player. Considering the numerous cases for both instances, it is safer to keep all reports of such activity private - you gain little to report a individual publicly.
The MVP system can be considered benefits for consistent patronage. It isn't demanding that every user spend to climb the ranks - it is nice rewards for anyone already engaging in such activity. Very few people will have anything of the higher tiers, but that wouldn't be the point, would it?
Because KMS is the primary version, they are also the testing grounds for new features. As such, a feature might be determined to negatively affect the game and be omitted from other regions. In this case, it appears the omission was due to them causing significant "power creep." This is why newer content often requires much higher damage. But that is not a reason to ask for more damage - The request should be to reduce the difficulty to match GMS' implementation, since our power creep is less significant.