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 forgot the most important part of successful ICO's which are detailed whitepaper and solid marketing strategies. Without these two, ICO's will not become successful.
Right now, hype is not very useful as investors already knows this kind of tactics especially if the hype is very obvious.
But hype is among the primary things that marketing is trying to create. In my observation, hype is the next important thing that could promote a project after the quality of the product itself. Because solid marketing strategies will not really convince some investors if the project itself has a poor product to offer. Even if the marketing strategists make it very solid that the brand is reaching all potential investors, by the time these investors take a look at what the project is offering and they see the poor product, they will not invest.