Reg. overlap: I agree that overlap should be ignored with --keep-complete. I just don't have enough experience to decide this alone. I wasnot sure whether overlap=0 should be forced with --keep-complete or whether it should be ignored only if user did not explicitely specify a value. I think forcing overlap=0 is the better solution.
There is a *small* exception where overlap=0 does not produce the same results like overlap>0 with keep-complete. The new process-destination option copies destination tags from links to motorways/trunks. In case the motorway intersects the bbox and the link does not the destination tag will not be copied to the motorway with overlap=0 because the link is missing in the tile data. So I propose to keep the overlap parameter but default it to 0 with keep-complete. The described case should be *very* seldom... WanMil