Would be good if you could import contacts via vCards and export contacts from Studiometry the same way.
Would also be good if you could export specific contacts (e.g. all those in a project, or single contacts).
Would also be good if you could import a set of contacts (e.g. a vCard collection) to a specific client / project.
(But not hopeful - as to do this you'd need to fix the awful contact handling system in Studiometry... which in turn might finally 'fix' contact synchronisation... which seems you've decided against doing)