This is exactly what we have been doing...and even after the space label fix will most likely become our standard. We are more and more trying to push tag/markers/notes/etc to the annotation layer to keep drawings organized. Alway fought the stacking order of space objects ... want the boundaries to be behind everything but the label on top. So the new Data Tag object allows us to do just that, per drawing PLUS the Data Tag can be used in 3D (live elevations & sections) as well. Probably will help eliminate a handful of classes from our standard in the process. The only issue is much of the data is not editable from the Data Tags (finish labels, ceiling height, etc), but not the end of the world.
That being said, still want the bug to be fixed so those tags work with our older drawing standard.