Any chance you can ask him where/how a normal consumer would file proper bug reports on the SYNC software? There's some issues in the 2011 fusion line that I've found and would love to report but the only angles are forums and tech support line which i don't have much confidence with.
Regarding the harddrive usage, i've disabled windows defender, auto defragging, windows update and it doesn't seem to make much of a difference either. When you disabled indexing, did you disable _all_ of the directories? There's a modify screen that you can remove like 5 directories. After doing this, it cut the HD usage a great deal but every once in a while it'll spike up and just think to itself for a while... i've never figured it out.