What is your suggestion?: The ability to exchange barrow pieces for barrow points. I think 2,000 points per piece is ideal. It doesn't give too big of a boost as you still need at least 8 pieces to get 15,000 points.
Is this in OSRS?: No, I don't think so.
Has this suggestion been accepted already?: Not sure
How would this benefit Alora?: Yes. This will help those with bad RNG or those who are trying to get a particular set of pieces. I have many extra barrows pieces. I can neither trade them nor sell them. Having the ability to trade them in for barrow points allows people to get rid of extra pieces and receive some extra points to the 15,000 points required for a random set of barrow.
Edit: Just read the other post. In order to prevent people from buying cheap barrow piece off TP and exchange them for points. Make those paritcular pieces low points like 150 each. Or set this for ironmen only.