I love balconies but if it's not big enough to use as an outdoor room, it becomes borderline useless. One of the reasons I bought in my building was that the condo came with a usable balcony. I've got 21 plants out there, a table for 4 at one end, a table for 2 at the other end, and they'd still be room for another 8 people. And with solid concrete walls, you never feel like you're dangling off the side of the building. It's a proper outdoor room. In a city with a dearth of clean safe green space, living in a high-rise with a usable balcony is invaluable. I spend a couple hours out there every day, 7-8 months/year.
If they're going to bother building balconies, design them so they're usable space.