Since there have been more interesting content lately and the most recent updates from OSRS, people have really forgotten Barrows, which I think they shouldn't. I totally agree on giving barrows a little spice to make it more enjoyable for those players who still do play that minigame, like you do.
However I'd think it wouldn't really be a major thing to be thinking of.
I am not saying its the most important or necessary change, im only saying it would make the 6th kill look less like killing a normal mob and getting the drops on the ground. Would just more look like barrows. :)