I'd like to suggest a feature similar to FFXII's chains that gave better and more loot the longer you chained killing mobs. In FFXII if you continued to kill mobs from the same family you would start getting more of the common drops and start seeing rare drops.

For FFXIV this could work in conjunction with the exp chain bonus and for as long as the chain is kept up you will see HQ drops at a very high rate from the mobs.

Since the exp chain will only work on mobs that are your level or above, this will prevent players from farming low level mobs continuously for HQ items at this higher rate. They would have to settle for the normal HQ drop rate.

Just a thought, thanks for your consideration.