Whether he gives 500 people DACA benefits or 15,000,000 people, Republicans will whine and cry about it so he might as well go all out and do the absolute max he can do.
I don't think there is much else that can be done or should be done by him for those who already have DACA. Sorry. You've had yours for 2 years now so let some others catch up first.
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Late 40's Dreamer (Holy Fucking shit I'm almost 50 and still dealing with this), aged out of original DACA and didn't have a chance to apply for extended DACA after Republicans killed it on the vine.