Easy =/= Oversimplification.
3e was not easy for me.
I don't think it has to do so much with ease of play as indistinguishable mechanics. Rolling 1d20+mod for everything ever means the game feels monotone.
Real life is in color. It needs a variety of mechanics to satisfactorily simulate and stimulate. I'd actually much prefer if they added dice pools, card pulls, betting chips, and whatever else they felt worked in addition to the d20 mechanic, instead of oversimplifying even more.
Maybe it's an inability to see outside the 3e box? I don't know, but I do agree with the blandness of the mechanics - as if thoroughly de-prioritized "fluff"/description will make the game engaging after the fact.