Besides that, i doubt even the Blockland's Steam hub is enough for them, people like things to be as convenient as a single button press, if they have to go out of their way to find something, they're probably not gonna bother, so there should be an in-game link to the various boards in the BLF's 'Blockland Files' category, there should be a link to the Help board, and even a link to the Suggestions and Requests board
There should also be a thing that tells them that they can use their Steam key to register on the forums
And i still think a workshop would help, it's done Garry's Mod well enough, we still have our add-ons here and on Blockland Glass, just to make things even easier, and to appeal to the Steam users, there should be a workshop so people can just quickly open it up and automatically install a subscribed add-on, for Steam users, it'd be like their own default Blockland Glass
If something gets deleted from the workshop, you'd still have the add-on file, like Garry's Mod, you'd have to program the game to delete the add-on, but i don't know how you'd even do that unless things uploaded via Steam Workshop would have a special file like Glass' JSON files
What does happen when something is deleted from Glass? Do you get to keep the file and it just never updates again? What if it's re-uploaded?
Anyway, i think Greek2Me is still around, he could just remove those if he has control over Blockland's community hub