Hytale will feature an in-game server browser with a list of servers. I am pretty much certain bans will not be permanent and will work more like Minecraft's. They do say they want an anti-cheat, so I assume servers can be set up to issue automatic local bans to anyone caught by the anticheat...
I agree that they should use a business model such as Java Edition's; ~$30 for the base game with free updates, like Minecraft Java, is around what I'd expect and am hoping for. Hypixel would know that their audience is going to be mainly players coming from Minecraft Java Edition, and Java...
I do think Hytale should feature some simple but advanced and extensible wiring mechanic like redstone, but maybe with a lower barrier of entry. Maybe like blocks with controllable output directions by right-clicking, something simple like that, but with additional more advanced mechanics...