There are many reasons to move to a better supported network, but we can’t foresee the possible reasons people could have for sticking with an earlier iteration. As we all know, this is uncharted territory.
This testnet is going to be the go-to implementation for a while (until the next testnet is released, which could easily be months away). If there’s any chance it can survive on its own after that, I think there should be a failsafe to protect MAID-owner investments.
And, as @happybeing notes, there may at some point be a “good enough” release before the official release, so this issue does need to be addressed, and I would suggest addressing it sooner rather than later.