On the technical, coding side there is a lot of people who were capable of creating a system like Bitcoin, as evidenced by the amount of altcoins that are now created. Okay, so yeah a lot of them use Bitcoin as the foundation, but they also come with their own different flavours, and improvements.

However, Satoshi didn't only have to code the whole thing, he had to think of the idea, and try to use hindsight on predicting what the world would look like in 10, 20 years, and beyond. He had to come up with an idea, and solution on how to keep Bitcoin having a constant injection into the economy, while not releasing too much too early. So, he implemented difficulty, which sort of regulates the amount of Bitcoin in circulation at a time. He also had to come up with a way of securing the transactions, and this is probably the most impressive part of the whole thing. Implementing something which prevents double spending, isn't something that a lot of people could do, well at least thinking of the solution, and then implementing it.

I don't think Satoshi is as super human as people tend to think of them as though. However, they saw a problem, and implemented a solution. There are definite short comings of Bitcoin, and whether Satoshi was aware of that, and was going to address them later remains to be seen. However, its most likely that he hadn't come up with solutions to some of the issues that exist in Bitcoin today, and was possibly hoping for others to contribute, and come up with solutions, which you could partly argue happened.