Good to hear Nissan took responsibility over the Jatco CVT; and you don't have gasoline direct injection, that's win-win.
Let's assume that your original oil consumption issue was due to sticking piston rings from carbon build up.
You see there are many solutions to that problem., ie: Solvents: Kreen, B-12, MMO, Sea Foam; Detergents: Rislone, BG109; Esters: Auto RX Plus; Acids: AC Delco Upper Cylinder Cleaner could have worked in either a piston soak, as a short term flush or in a whole OCI...
Dealerships and their mechanics have an interest in making maximum profit from their customers. They'll probably recommend a ring job, of course most car manufacturer's will consider almost any kind of oil consumption issues as normal and within specifications due to liability - same with recommending any kind of third party additives, which is why pretty much no OEM can ever recommend officially.
Be proud to have made the choice for direct action OP