My two bits of advice: Don't take a long time to release the new blockchain. That's like the games that stay in early access for a long time, so by the time they finally reach full release no one is paying attention to them anymore. And name it something that doesn't include the name "Steem". Not only should the new blockchain and coin be an entity unto itself without hearkening back to the Steem branding, but using the name Steem has always been a point of confusion for some between Steam the game platform and Steem the cryptocurrency. It should be a new and unique name.