If they did, then you would know how long they have been sitting in the warehouse!

Seriously, based on all the claims of "aged tobacco" what date would they stamp on the box? The date of rolling, the date of boxing, the date they left the factory?
As for stating the blend, that's kind of like putting the ingredients on a menu. There are some secrets best left alone. Most state the wrapper type and that is more than 50% of a cigars flavor.