There's nothing to improve anymore because after investors found IEO and STO, they shifted their attention to this two new crowdfunding, new coins should now target IEO and STO and just forget about ICO because it's notoriously known as a haven for scam PROJECTS.
I disagree with STO, STO is the same as ico nothing is successful, indeed STO is a new way but is not in demand by investors, and investors prefer IEO