The fact that the omissions make them more difficult to search is why they were omitted, duh. If the premise of time constraints was accurate, they could promise to re-release them without the omissions.
This is the same tactic of making produced documents less useful that Hillary carried out when she delivered hers in completely unsearchable form, although to a lesser degree.
Why does the msm not approach these emails with the same resources and fervor that they employed for analyzing Sarah Palins emails, which If I remember correctly were not dumped because of an actual criminal investigation?