I think it is that ROBLOX don't want you building on mobile devices. ROBLOX has already said that ROBLOX Studio is a desktop application and they want to keep it that way. However, it's not as if the ROBLOX build tools are hard to use on mobile devices, I find using them easy on Welcome to ROBLOX Building, this is on my iPad. So I don't think usability is the problem, I'm just not sure. |