So much in here, and it all sounds good. The big take away for me is the learning from GO are forming the blueprint here. That is a good practice and there is nothing meaningful I can add to that.

Above the game design, the concept is appealing, I'm interested already.

Big QOL standout for me ..the mining/claiming feature.

The many potential needs to use the tradable currency to progress game aspects will slow down the extraction race and can be pushed about to favour converting the tradable into the soulbound.

As for what to do with GO, just let it run and allow GO players to transfer their "spellbook" into the new game, that will be more than enough, maybe 80% 0r 90% rebate will be sufficient, I think you should get some reward for signups even if they come from GO, besides, I think you probably have a good chunk of the active Hive game community in the GO rosters as it is.