Child Theme vs main theme used with default theme plug in

Over in the plugin support i asked a question and found out that only the main theme choice works with the default theme plugin. andrew quickly helped me on that *thanks"!

My question is just a opinion type i guess.

If the social child theme is used as main blog theme and is changed (colors, etc), then the main theme packaage is used as the default...... would this not make it cumbersome for users that modify the base theme if any updates are required. especially if it is used on several blogs.

so in your opin, which it the recommended scenario to use...... ignore the child theme all together or maybe replace the default directory (the default WPMU files with the) the child theme files?

any opinions would be appreciated. thanks.