We have noticed that a lot of successful ICOs have exhibited common factors. One of these is their use of hype. Another is a detailed presentation of the company's roadmap.
You talked about 5 successful things that ICO have in common and yet you only listed 2 here, so you are leaving us with just two to talk on. Nevertheless, I think you are right about it, one thing they have in common that is destroying them is hype. I prefer a project to grow to the level where the hype will come by itself and not the one that people artificially create hype for it, which is why you see that they all fail along the line.
Hype fails them a lot because people will only be invited to take a look at what benefit the coin can give financially and not the product itself, if the hype was on the product, then they would have gotten people using the coin product itself than just investing to expect some sort of cash to come out of it without them asking how the product is generating fund exactly.