I normally take my backpack with me. Since I have been carrying a backpack I have been putting my back tag on it. Nothing will change for me. I hate the idea of no back tags.
I hated the backtags, especially for bowhunting. I always carry a backpack with me so I like the idea of keeping the paper tags in the backtag holder and putting the holder in my pack.
I've been putting the holder on my back pack for years, then hang it visibly in the tree. Probably just put it my pack now in and just attach the whole works to the harvest.