The purpose of "SaveMiku" is not to promote unauthorized copying or re-uploading the deleted videos.
The purpose of SaveMiku is to restore the videos by submitting a counter-notification if the videos are deleted by a false report that it is infringing a copyright. Re-uploading means nothing. The number of views and the comments will not come back.
If the video is uploaded without getting permission from the copyright owner, there is a risk the videos can be deleted easily.
Don't you think it's sad when the video gets deleted? I think we should avoid that by uploading the videos in the right way. And we should respect the creator's copyright.