It would be convenient for users to import multiple certificates at once and certify them.
Kleopatra could show for each key the fingerprint and all userids which would be certified.
A bulk import could establish a base of communication partners. Especially if the keylist came from a trusted source. E.g. from an Administrator.
This would only offer lsign.
(I think we still need to fix that you can do a sign after an lsign with kleopatra)