Earlier quoted context omitted.
Workshop was huge, albeit late, addition for the community, even without a map editor. But even Blizz couldn't reliably make maps using their internal tools that kept Reaper where he was supposed to be.
Was definitely a step in the right direction, they like to say their map making tools are too complex to release which is almost offensive. If employees can learn them then surely dedicated community members can figure out enough to get by. Community maps are never expected to be perfect and if one was ever picked up for the official rotation they could clean it up as needed.
I think that's the key -- if the tool allows you to harm the user's computer in some way, then it's not a tool you can really release without polishing a lot more, to prevent the failure modes. And it's particularly bad if it's hard not to mess up.