I agree, plvls is not at a good place right now, it's mainly the only thing keeping players to the game atm, well those few that are competitive, but it's not really helping the game as a whole. if you don't have 10 hours a day to farm, you can't be competitive, it's not possible. You need to be same plvl as those guys, farm grifts 24/7, get those 1% gem upgrades, get those 1% item upgrades. It what makes a HUGE difference in the long run, someone who has a job, likes to play another game too etc has a hard time just making it into the leaderboards cause he isn't playing as much as those players that are farming 24/7. And that shouldn't be the case, you should be able to play half as much as the highest player, and yet be competitive and be able to beat him on leaderboards. But there should also be other factors for the longtivity of the game, but something that isn't as much game changing as it is now.
I just hope Blizzard actually does realize this and adresses this in future patches/expansion.