...If the developer successfully does this, maybe it can help Luna get a good position. But I still have doubts about it.
Even if Do Kwan succeeds in realizing all his plans, he will not regain the trust of investors in full to the Terra blockchain. After receiving their compensation, investors will sell UST and buy a more reliable stablecoin, for example, such as USDC and BUSD.
I don't know and am not sure about that because as you said, the investors lost their trust in Luna after the big crash, making them lose big money. But your scenario makes sense because the investors want to recover their loss from Luna by selling the compensation, but I am not sure if that can cover the loss. It is still a mystery for Luna and a big question to us if Luna can regain investors' trust with the upgrade of the project. So let's wait and see what will happen to Luna.