Why change Renekton ultimate!

I know that Renek's ultimate is a little too powerful at 6 but after they changed, it's now way too powerless at 6 if we compare it to nasus and many other champion. Though it's arguable that his late game is now stronger but as a Renekton late game isn't the play style of Renekton as a champion, he is an early game champion. And so now that his ultimate is so weak he can't really be specially strong at any point in the game anymore. Please make his ultimate a little more powerful early, it doesn't fit the champion play style to be strong in late game.