the biggest risk in the standard euro barrel is its resistance to snapping they snap easily across the very screw hole which "secures" them into the lock case this is because they have to remove a large portion of the remaining metal which joins the two halfs together, the design is weak and the hole adds considerably to this so why not get rid of it.
i know there are snap resistant locks out there but they may not suit every budget so why not offer a lock with a small dimple on either side about 4 mm wide and design all future cases to use a grub screw to secure the barre,l if this screw was m6 then it would be backward compatible with the current barrels with a m5 thread.
just another idea
by the way my front door had a standard twin combi held in with a m5 grub screw.