I don't believe investors will have complete faith in this newly launched luna 2.0. Even still, no one will trust the project again since some investors will continue to believe that something similar will occur again.
They were not fully compensated and there are also ration based on how many UST already hodlt by investors compared with how many luna token will be fully received by investors. So many times investors are in demand to refund it through another stable token instead of received the new token. This time investors have been loosing a lot. People lose their trust to this crypto. Im sure that if investors aware about how risky investing in the new luna as well.