Hey, I was actually thinking about that unfortunately I have a few else to handle around JRuby-Rack & Triniad thus I'm not sure when I'll get to it.
Feel free to open an issue I shall label it as a feature requests - you can still deploy and configure a dummy app and then update it with the real one.
However it does not solve removing - you should once again deploy a dummy instead of the real one.
However, I think TorqueBox does provide this functionality ... feel free to check it out.
K.