I was installing a sitecore package and noticed one of the items that should have been renamed were not. I had chosen the Merge Merge option. I decided to futz around with the package install options and found that I want something between merge and overwrite.
Overwrite ends up renaming the item but it gets rid of any subitems (if they weren't part of the package). Merge seems to silently fail without telling me that it wasn't able to rename the item.
The goal is to update items that were changed in a subtree without:
A) including all of the items that are part of the subtree
B) rename items that have their names updated. If anyone has a workaround they use for this
Please let me know. This was done on Sitecore v6.6.