eBay Senior IOS Developer interview questions

I applied via company website, got a phone call from recruiter for an initial screening. After we scheduled an interview date, and as it turned out, they messed up an order of interviews, so it has been rescheduled. Interviews themselves were fine, but I got rejected for a reason which sounded a little bit strange to me. It happens, I guess.

First step was phone interview it was an hour long after that they send me a coding exercise, which I develop in 5 hours (I thought doing it in short time would be plus point, which was my biggest mistake). App was to create a weather application using swift and MVC, I use different swift features to show my language capabilities and some test as well, I write few tests of different type like testing simple method, testing async method, testing with stub etc (to save some time). And they like following things Good separation of concerns, Well documented code, Look'n'feel of the app, There are some passing tests implemented, Swift 2.0 error handling They said following things can be improved more 1. Test coverage, more use of compiler features, view controller methods are long should be broken down