Really like how the shutters came out
Agreed that the stairwell one needs something different, it almost seems like my old condo that had a sliding door on the second floor but no balcony so just a safety railing across it. Adding on top might work as you noted. It would seem weird at first but if it allowed you to shut the bottom for privacy while leaving the top open for light you'd be more likely to use them for what you wanted them for.
As for the fence 6x8 panel of similar style is about 110 at home depot, there are 8 there. Plus posts posts and caps, call it a grand. Labor on metal/vinyl seems to be about 50% of materials costs so 1500 if that was the case. 2200 does seem a hair steep.