McDonnell is a... um... potential... weak spot, but then he was always going to get a big post, like it or not. Though the trouble with him isn't quite what people think: it isn't that he's got extreme views on some things, that's not exactly it...
Anyway, Healey at housing is good, and a vegan and animal rights campaigner at Environment is excellent trolling of the NFU.
Apart from McDonnell it's not that bad, especially given the number of high profile people who opted out.
Corbyn needs to get a media strategy beyond "you're all evil". Undoubtably some of them are, but it's not clear that he's distinguishing them from the rest at the moment.