I have run into a few different problems that could all be fixed by a simple feature. Relating to Gift Certificates, once one is setup, you cannot change it at all. On the CSV import, the Expiration date defaulted to March 2014 (in the past). I didn't think it would be expired already, I was thinking March 2015. Anyway, once imported I was screwed because:
1. I could not delete it, only inactivate it ( which means I can't use those codes again).
2. I could not change the expiration date (no edit feature).
3. I could not re-use that code and fix it (no duplicates even if inactive).
4. I cannot adjust the dollar amount based on an offline purchase.
All of this could easily be resolved if you simply had an edit option, that lets you change at least the open dollar value and the expiration date. I also think allowing deletions to be permanent would be better, but at least if you can't delete, if you can edit you can fix it to how you want it.
This ability is actually going to be critical to allow us to operate with vouchers for our customers. So I would "desperarately" request that you add a feature to edit existing gift certificates.