Hi, this is Jeremy from Vennd. I'll stay out of the political talk and let you guys make the decisions that you need to make.
If there are any asset issuers out there who would like to move over to Counterparty, I'd be happy to assist (for free). There are a few ways in which a migration of assets from MSC could work. We could set up a vending machine which detects a burn of a MSC asset - a send to a provably unspendable address and then send the Counterparty equivalent to the burner. This is an opt-in burn. This burn period could be run for a while to allow people to withdraw funds from exchanges, etc.
Is there any reason why the burn period would have to be of limited time?
Technically, there is no reason. It's just impractical to keep it going forever.
Scotcoin moved from their own blockchain to Counterparty in a similar burn. They decided on a similar mechanism to remove inactive holders of their coin. Note: They didn't use Vennd.
edit: 'supporters' to 'holders'
I just checked out Vennd and I'm pretty impressed, very cool! Here's another question then- if something like maidsafe choose not to move over to counterparty, could we still use Vennd to port the tokens over to Counterparty so we could more easily buy/sell/whatever with them on counterparty, and then 'cashout' to move them back to mastercoin? It might be a nice way to 'introduce' token issuers to the idea of moving to counterparty.