There will always be issues, but school choice resulted in
- general confusion; the guide to high schools, for example, is bigger than the Yellow Pages, and that's with all the information of a high school summarized into a single-sided page. Couple that with Bloomberg splitting failing schools with five schools in the same building and it's just far too overwhelming.
- horrible commute times. Schools were designed to serve their local neighborhoods and usually aren't placed well, particularly in the outer boroughs. If you have to go to a school other than your neighborhood school it can be quite the schlep, especially once you factor in start times. It's impossible to design start times that work for everyone when students come across the entire city, and the lack of coordination also affects things like the overburdened public transport, which gets slammed when schools let out.
- extreme stress on parents and students. You have to go around and tour schools. You have to meet with teachers and principals. You have to attend multiple massive school fairs with staff pushing their schools on you. It's like a college application process, already stressful enough, except you're doing this to children going through puberty. It's absolute madness for even wealthy parents with time to do all of this; working class people working long hours or odd hours or multiple jobs basically don't have a shot. And can you imagine what not getting into your top choices does to kids' well-being?
If school choice were limited to the borough level, it would be more manageable. But at the city level it's far too much.