"however have been advised that being enclosed adds more value to the property"

I would go back to the balcony. I do not see that adding dollars or subtracting dollars by eliminating it. It is kind of ugly and the color does not go with what you have anywhere now.

I see nothing about that that is increasing the home value it does not belong so go back to the original balcony.

It depends on where you are located. If you get it back to a balcony, will you be able to use it for most of the year?

I think that it is great and it would certainly add value for me. Well, like Elaine said, it depends on your climate. It looks well-integrated into the home and very appropriate in this photo. It may look terrible in person.

I think a balcony would look so much more modern and welcoming than what’s there. Get a good balcony design in keeping with the house.

I find the multitude of different windows to be more of a problem visually than the enclosed balcony. Changing them to bronze and and making them the same would be another way to go and keep the sunroom. For me, the problem with the balcony is the textured glass at the bottom. Adding a large planter under the lower middle windows would help making the expanse of driveway less overwhelming.

It looks more like a greenhouse than a sunroom at this point, you can always add some rolldown clear screens if you wanted to give it use in the fall/winter https://www.minnesotascreens.com/product/phantom-motorized-clear-vinyl/

I think the textured glass might be the original balcony railing?

I live in a cold climate and love our sunroom, we call it a 3 season room. They are very desirable around here. We use it spring, summer and fall as our livingroom. Sometimes if we need the room in the winter we open the slider door and turn on the heater. At one time it was a porch and could only be used in the summer. I would never consider turning it back into a porch and it would lower the homes value. Its use would be greatly limited.

How large is it? It hard to tell on the picture, but if it is narrow balcony then I don't think it would hurt the value greatly, if it is room size then it would hurt the value if you live in a cold climate. You could reframe it with different windows or paint your home to blend with it.