Yobit makes a habit of being late with swaps or even asking for money to update wallets.
It is very possible that all exchanges will swap and yobit will not but it will keep trading the old coin. People will be buying there expecting to withdraw to new wallet and it won't work. That will negatively affect ESP even if it's not the devs fault.
I suggest everyone remove their coins from yobit and certainly not buy from there before making sure they are synced to the new chain. Sadly some people might try to take advantage of this very thing by leaving it there hoping to sell it at 10x the normal price
Do not worry, we will give ample notice prior to the swap occurring, and will allow people to swap for quite a while. we want to ensure everyone has the opportunity to swap out their ESP.