That could be really a good idea for honest ICOs. Why they need to raise all money at once? Then they are not motivated to do something, they grab money and leave the market, but if they see that they have to do something for money, they will work. 
I think that is their main goal here, to raise as much money as they can in the first round so that they can continue with the development of their project. There are expenses that needs to be settled behind that is why it is very important to reach soft cap or even hard cap in the early stage. Assuming that they didn't they another round is needed. My only concern is that if they didn't raise money for the first time, then what are the chances of the project to survived if people are not going to be interested anymore?