The top 5 to 10% of players are the part of the community that are most knowledgeable about the game. They absolutely SHOULD be the ones making the decisions about balance because balance doesn't really affect the rest of the player base anyways. I also don't understand what changed that made the game so terrible to play. Personally, I have been having more fun than ever especially since the commander revamps.
You are confusing rank with knowledge of game mechanics, they are different the same way a driver does not have a better understanding of car than a mechanic. If you watch high level player's streams you might notice that some time they make comments about game mechanics that are simply wrong. The average moder has usually much more knowledge than the average player.
Only Relic makes decision about balance because it is their game.
Finally this is forum for people to provide their opinion, only moderator should have a say on who and how the provide their opinion.
Relic Entertainment
cblanco ★ 
Heartless Jäger 
