I found lately that account level means mostly nothing. It turns out even so that, for example, 90lvl is much worse than 15lvl because 90lvl plays a lot and still have same real skill level as when he started the game, they stuck on that rank playing so much, and lvl 15 may just started the game, but have much more potential and better skill so soon they'll be gold or plat at account level 25.
Account level is nothing compared to player's skill, it only shows for how long you play this game.