If perks can truly do what Attributes did, Attributes would best be removed since the memory could be used elsewhere. Most people likely don't want to deal with the numbers and just play the game. Skills are pretty basic, practice them and they'll improve. Not hard to manage, and perks likely have some form of benefit, so a player can choose one they think is best. Also, perks don't have to be constant in effect, the strength of the perk can be dependance on other factors as well, so it can still be small jumps instead of giant jumps. Under the setup of perks and skills, I imagine it would be easier to build the character to a player's style of play or a certain of playing (warrior, mage, thief, etc.) In terms of the general audience (and in turn business), it would be better overall to replace attributes with perks, since perks likely can do much.
However, we truly don't know how effective the system will be until the game release and we see it ourselves. If the concern is in the game becoming simple in general, complexity is basically a mess of simple things.
This is my take on the whole attributes or not deal, the game as whole isn't about the stats to me, but doing what I want to do and being whatever I want to be