Personally, I prefer the usual ico on ethereum. There is much more transparency. And the advantage of ieo is only in the fast listing on the stock exchange.
I agree with your point. Actually I believe IEO's are just sugarcoated ICO's designed to be more attractive to investors but don't get rid of the risks associated with ICO's. With that in my mind, I'm afraid IEO's will be used as a tool for projects with malicious goals to further scam investors since these exchanges will not guarantee successful product delivery for every IEO it will conduct and I hope the community should consider that idea before they take any investment action.