Agree re the side lever over the bolt for multi shot. In fact for hunting I use a 400 with Rowan multi shot adapter because it's quieter and the rifle can be de-cocked and silently re-cocked in the field.
The trigger safety! Not sure what AA were thinking. Do the latest have that trigger tension spring as an awkward add on? A "floppy" trigger was another useful "the rifle isn't cocked" indicator.