This is highly professional way to resolve the issue by refunding early investors and let this on their choice to decide whether they still want to invest or not once the chain will be restarted after the fixing of issues. This is impressive attitude and shows confidence of developers in their project. I will be following for updates.
I would agree as long as they agree to do a coin swap as well. Many people spent time and money mining the coins and the dev has not yet committed to doing a coin swap.
Dev, can you confirm you will swap coins on the new chain?