One panel on each side of a window makes no sense to me at allhow about no panels at all.

How about trying a lighter colored curtain, or getting several more panels of sheers and just use them. Sheers by themselves need three to four times the width of the window to look right, but can be a great look. Breezy and airy and still private if you get the fullness right.

Go with the fuller sheers.

Fuller sheers and/or lighter panels on both sides of each window if you want it more dressed.