IEO basically replaced ICO. So, for me I don't mind if ICO will have a come back. But personally. If it did, I would still prefer IEO projects because I feel safer with it compared to ICO.
Everyone obviously will not mind if the ICO can return, but to return the ICO seems to have been very difficult because people's trust in ICO is gone and you even say you prefer IEO on the grounds that you feel safer compared to ICO.