Well, RB was a pretty huge need this time last year. There was no way we could enter a season with only Choice behind Barber. We didn't know if Choice would be any good, and we didn't really know what Barber was either. We absolutely needed a pick like Felix.
And I think the same argument could be made at corner. There's a reason we stockpiled corners last offseason (Jenkins, Scandrick, Pacman). We needed them badly.
Yes, we needed a receiver like what DeSean Jackson has turned out to be. We could also used any number of other players, too. A safety, an offensive lineman, maybe another pass rusher.
Unfortuantely, we didn't have three or four first round picks. All in all, no complains on my end -- even though, yes, Jackson is a much better player than I imagined.