I am going to wait a little while before jumping on-board as there are still some limitations. I also want to see more people posting content on Hive before I start indexing Hive posts for STEMGeeks, but that may change depending on how things develop.
From what I understand, Hive-Engine will require an airdrop for each token individually to move the balances over from Steem-Engine to Hive-Engine. I need to do some testing with my Air Drop tool to work out any potential issues using it on Hive.
Will also need to plan moving the state from Steem-Engine to Hive-Engine and make sure everything goes smoothly. I will likely develop a tool to do this and will be available for other Tribes interested in doing the same move over.
Will post when I have more details about that.