Thanks for the feedback.
My main reasons for inquiring about DeploymentPackager was:
a) to get as full a picture of Deployment Manager as is possible at this stage
b) that I'm very keen on - perhaps too keen? - on integrated development tools that offer a complete set of functionality.
I'm (slowly) realizing that the latter point is a result of me being "spoon-fed" by Visual Studio all these years and that even Microsoft is moving away from those "software monoliths" I'm accustomed to.
That being said, I'll get back to you if and when I have specific suggestions about ways your product could improve upon what NuGet offers.