Well each to their own, but I don't think 'incredibly easy' is the right term, perhaps for you! On the other hand, once you know how something works, in this case the A.I., most things do become somewhat simpler. In truth I don't want to learn how the A.I. works, for then a lot of the mystique and thrill of combat will evaporate. I know this from past experiences. I digress...
However; Yes, I'm sure time will make a huge difference. I've only just brought Skyrim recently, and though I've spent a lot of time in TES IV:Oblivion, the mechanics between the two games are dissimilar enough to make one feel a novice again. My style of fighting I've brought over - which is very reactive based and hence intimately tied to what the enemy is doing - just doesn't cut it here in Skyrim, at least not at the moment. Infact, I've had more success not paying attention to what the enemy does so far, which is a little disappointing, but one can only hope such changes with time. I put this down to, once again, being new and learning the finer points of the game, as well as my character's skill development being in it's infancy, e.g. blocking is limited in use at such low levels at you still get hurt for significant damage. This latter point, inparticular, is not a bad thing; it's just part of the process of character development.