I confirmed this by phone with a Trenitalia agent yesterday (I haven't bought tickets online since last year so I am not sure when this changed):
Trenitalia print-at-home tickets now show a PNR number instead of the scannable code icon. You will not automatically receive an email version of the ticket.
Also, le freccie trains now have a coach diagram so you can select a seat or get seats together more easily, or you can let Trenitalia assign them.