Well.. yes, you have the point.
In the meanwhile, it's donna be nearly impossible to convert that plugin's config to the config which i use in a way it would be transparent to the user. Mainly, because I use a bit different principle to configure build signing (that's basically the key difference between my plugin and Xcode plugin). Besides that, I don't plan to add OS X applications support (while Xcode plugin allows to build OS X applications too). Taking all those things into account, I don't feel like it's gonna be that easy.
Anyhow, I'll contact Xcode plugin developer, will see if we could find the way to merge them.
~ Eugene