Actually, that is a quaint notion that there is one set of "real problems" with this team. By what standards?
I could list a set of problems if the goal was to be a bruising running team. I could list another set if the goal was to be a high-flying passing team. Yet another set could be listed if we wanted a Bears/Ravens shut down defensive team...
There are many ways to win footballs games and depending how you want to do that - everyone is a problem in one of those scenarios.