There will be no quick price rise with a new dev or with the old dev... It will take months to rise and it will require new features.
Regarding those new features I think InsanityDev is the best person to deliver them as he has already prototypes. Even if he cannot work full-time I think he will still go faster than any new dev that we would hire.
I agree that disappearing was not a good idea but he seems to have serious family issues and I can understand that real life goes before crypto life. He now agrees to come here and give an update twice per week, which I think is good. So we should give him one or two months and see after that where we are at. In the meantime, if people want to do promotion or help on development I think the dev will be happy to accept that. And we still have some funds to pay for it if those people succeed.