Very forward thinking modification. I had an idea which may improve this, I dont know what you think but here goes...
If you could intercept post content at the time it is posted and to scan it for links to threads and posts then could the modification not convert those into the bbcode versions before the database is updated?
Its fine having this mod for staff to use and I assume you've done so so that links to important resources will function over time when URL structure changes.... brilliant.... however with this change mentioned it could also work for all other threads regardless of who posts links.
It may not be practical or easy to implement, you decide but it would certainly be a great addition.