Relatively minor but a scenario that happens when user no longer wants an extension to be dependent on other SCEs. Maybe i'm missing something. I've read the goal is to have minimal manual intervention in the /sce directory, hence the query.
User that wants to re-import existing extension so it's no longer dependent on anything is presently required to either run sce-remove and reboot, but of course this requires a reboot. Otherwise user can simply delete all of the extension's files from /sce or at least delete the *.dep file, which is manual intervention.
For example, run sce-import -d nano-tiny and make dependent on xorg. User changes mind and no longer wants the dependency but running sce-import nano-tiny automatically finds and installs using the existing dependency file (despite the -d option not being used), and there is no pause and query to delete the old .dep file before proceeding. Alternatively, attempting to run sce-import -d nano-tiny does not allow for a 'no dependency' option in the 'Choose existing SCE(s) that will provide dependencies for nano-tiny' choice list.
The issue could probably be resolved if either sce-import queried using/deleting the existing *.dep file on re-import and/or if sce-import -d had a 'no dependency' option, which could then delete any existing *.dep file before re-importing.