It has all those things, but which of them do you find hard to use? People might struggle with alpha counters depending on their background, but otherwise I don't see the complexity.
You have to learn when and how to apply them in a match-up, but people will figure that out pretty quickly and optimise it all.
Then? Then we need SSF5. And again as above I'm not saying this is a negative, it is the perfect approach from Capcom. But it is what it is and it'll get old fast.
Lot's of things are easy to do when fighting against a training dummy. However, it gets a little more difficult when you are fighting an opponent that is capable of thinking and adjusting. That is the beauty of a fighting game.
Tight links don't actually add anything substantial to the experience, they are just an arbitrary barricade. The majority of the tech in SFIV is actually pretty easy to use, it just heavily advantages people who know it, while crippling people who don't.
As an example...
Plinking isn't hard, but its existence means that those who haven't been told about it are more likely to drop their combos. Option selects are super easy to do and, once again, the only purpose they serve is to give an advantage to the guy that knows they exist. None of the this stuff makes the game better, all of it just makes it less accessible. A fighting game being honest is NOT a bad thing.