There is no need for a manual coin swap at this point. What you do is re-use the same wallets. It's called wallet forward compatibility. It's quite simple to do. You create a new blockchain, premine all the old coins, send the coins back to the same addresses that first owned them and then make sure to keep the original blockchain to maintain transparency of coin creation.
The coin swap process should require no participation from anyone.
The exchanges and users would simply backup their wallet.dat, upgrade the software and then copy the wallet.dat into the new directory. Paper wallets would work the same as before. Import the private key and your coins are still there at the same address.
All transparency is lost in manual coin swaps making the cryptocoin nothing more than fakeness.
it is possible that the devs will fudge the swap to their own benefit, i hope with your obvious concern you will ensure that they are kept fair and honest

please devs, after the exchange swaps, we will require a comprehensive history of all manual transfers and remaining pre-mine. thank you.
lol, and don't forget that the chain will be running the entire time of manual swap and minting new coins. this is outrageous
