I've played a few hundred hours of Skyrim, and I do agree with a some who say it's simplified. But is that actually a bad thing? On one hand, the simple mechanics make interactions with the structured content in the game world much more enjoyable. On the other hand, being simpler prevents some things from being possible that you may want to do. And on the third, mutant hand growing out of my back (a result of the 150 hours I spent in Fallout 3 in the months waiting for Skyrim's launch), the limitations created by any simplification can be used as a means of nudging players in the direction of any of the myriad of interesting things tucked away in remote locals, or simply to keep the game from being broken.
Consider this example. In my travels across Skyrim, I was climbing a mountain by the good old "run blindly into a 50° slope and mash the jump button" technique, having ignored what looked to be a meandering trail which wound around the mountain which I assumed would take too long to follow. About halfway up, I questioned why levitation was not included in Skyrim, as levitation is certainly a thing that exists in the TES universe (as evidenced by various books, as well as the fact that it was in Morrowind). Why is it that we can't have levitation, a spell which would be infinitely useful in a game world which features a mountain or two (or fifty)? I suspected it was due to the fact that each major city is its own cell, requiring the player to enter and exit though main gates, and that presumably it would be incredibly difficult to make entrance and exit through these possible with levitation. I reached the summit of the mountain, found something or other which I didn't care enough about to remember, and proceeded to jump off the other side using the Fade shout.
A month later, I unwittingly returned to this mountain via the trail I had ignored the previous time. Following the trail, I found a small chest filled with treasure hidden under a basket, I used ice form on a bandit and watched him roll off the side of the mountain into the valley below, I crossed a canyon by walking a narrow log after nearly falling to my death after being startled by and calming a lone bandit I had not seen sitting on the middle of the log, FUS RO DAH'd a bear into a troll, and I found/saved a pair of hunters who were being mauled by bears and spriggans next to a beautiful little lake at the top. I would not have found these things if I had a levitation spell, nor would most people, because there are few people who would climb a mountain when they can fucking fly up the side.
Of course, I'm sure most people who think the game is too simplified have a billion reasons for why they feel it should be more in depth and complex. I've not actually heard that many reasons, other than "RPGs should be as detailed as possible so that you can do anything you want within them," but I'm assuming there are a lot of legitimate points out there other than that one. To be frank, that by it self is a damn fine point. I dream of a day when we can have RPGs which allow you to do absolutely anything, respond to dialog with your own voice/text commands, and allow for true freedom to role play as you see fit with no restrictions past the physics of the game world. Sadly, it's a dream for a reason. We aren't there yet, and no one can make something like that. Maybe if Bethesda stole IBM's Watson and used it as the response generator for every bit of dialog, then spent the next fifty years working on a game where every conceivable idea was a possible game option we would have it a glimpse of it at the end of that fifty years. Unfortunately, that isn't going to happen, and I doubt your Xbox would play it anyways. As such, we are forced to rely on other human beings and pen & paper for our hardcore RPG experiences.
tl;dr some simplification and ommissions can make for a better game experience, and it's not like they're able to give everyone the absolute freedom to do whatever in their game anyways.