possibly something more substantial on the top shelves. one piece on each top shelf. centred.
Along the same idea as seen in the ref pic but not as bulky/large.
ref for idea

The shelves look nice, but maybe something bigger on a couple of shelves...such as the little aqua/blue thing on the seond shelf down and the little dish above it....maybe put them on the same shelf. and a decorative box or small candle holder...etc. But the blue picture in the center needs lowering. I am thinking maybe the top of the picture not over two inches above the shelves. OR four inches above the desk. Should be more eye level.

Yes, as erinsean mentions, the pic does need to be lowered to a few inches below the top of the etageres

No they look cheap need new units

You need something more substantial. Do you have any books? They look a bit cluttered with all those little things and nothing substantial on them