Registered developers can already submit code level problems[1], there are official developer forums and bugs can be filed with Radar.
Meanwhile at WWDC, it's a developer scrum to get a 15 minute slot with an engineer and walk him/her through code they've never seen before.
From my experience, engineers do their best but they have always looked somewhat tired, hungry and distracted. All things given, I'm not sure it's the best environment to solve non-trivial problems, although it is nice to put a face to a name.