As a function of the transform tool, or perhaps a tool in it's own right, a feature to numerate copies in sequence and/or apply fully scanning bar or QR codes. E.g. raffle tickets, concert tickets, coupons, vouchers, etc.
This would be invaluable as a time-saving measure, and allow an artist/designer to keep something like tickets completely in-house. I've been working with Illustrator for 15 years, and to my knowledge there's no feature that does anything like this. When I design concert or raffle tickets I have to use a 3rd party vendor, pretty much just for the bar code and sequencing. The ability to number things seems like a natural extension of the Transform tool.
MAKE IT SO!
Until some solution is implemented, use great 'Fixing Sequential Numbers' script. I guess you'll be able to figure how it can help you, with a 15 years of practice.