Now, it is possible to add the purchased item using ID item.
It is not so interesting as if it was the item name (using SKU) or if you could tag using both (name and/or ID).
Why? Because when you are working with AC is much more easy to remember the name of the product introduced in the SKU that the ID of the item.
Today, when you are developing something in AC, maybe you can remember the product ID, but be sure that in a couple of days you cannot remember what product is ID 4867 (for example) and you have to go to woocommerce to check every ID just to know what product is.
In the other hand, if you can use semantic labels associated to the SKU, it is much more easy to remember.
Of course, some name in SKU is needed, but it would be very usefull.