No very often I felt so
for I really can't think of the use... I know, due to my lack of knowledge...
What you are trying to say with the last gif, is that a drawing list that can be updated if one of the titleblocks is modified?
ie.: the dwg itself contains 5 identical title blocks with 5 identical attribute tags.
The attribute values differ of course.
Can you put these values (like E001 E002 etc) in the mlisp?
If so, then YES I and many others will have great use for it!
Creating drawing list!
If you'd need a tester for that, I'm here!