Since mostly people buy gold for long and mid term, you could add some sort of stacking feature in your website where people can stack their digital gold in order to take some annual profits.
Gold is already doing a great job against US dollar, so extra revenue from staking may be somewhat against the purpose of a stable coin.
Now, either this team or others (!) can make some sort of "bank" where people can deposit and earn staking revenue (or at least the "bank" would help people pay lower or no depositing fee).
But in crypto business the holders of big values tend to not deposit to such "banks" because "not your keys, not your coins".
Also, since I prefer to use your official website to exchange gold instead of the other exchanges, maybe you can add usdt pair on your official marketplace.
Since the team sees USDT as competition, I have my doubts that this kind of feature will ever be a priority (although I do see its usefulness).