Lua is terrible
Opinionated
Fix'd
Uninformed
Lua is pretty much as fast as interpreted languages get, there ain't nothing wrong with it. The only legitimate issue you can call that makes it "bad" as opposed to "lacking x feature that only one or two other languages have anyway" is the syntax.
Again, I might move this topic to the Minecraft Forums where it will be more useful.
This topic would never be useful. On these forums, everyone will vouch for Blockland. On the Minecraft forums, everyone will vouch for Minecraft. On the Roblox forums, you'll be banned and the topic will be deleted.
Anyone who even considers one being a clone of the other is handicapped. They all have their differences and it depends what you want from them.