I think the lineup if healthy is very solid. Reyes, Melky, Bautista, Edwin, Lind, Rasmus, Lawrie - that's a solid core offensively right there if everyone is healthy and plays to expectations. This team needs a second baseman though that can field and hit, and they need a catcher (though that likely won't happen). I'd love to see Marco Scutaro brought back to play second base - he'd be a terrific fit I think.
The bullpen, well they have so many arms they don't know what to do with half of them. I think they are fine in that department, and have enough depth if someone like Janssen gets injured/disappoints or an arm or two takes a step back.
The starting rotation is what needs to be addressed, though not sure how they go about it? Can't rely on Morrow as a No. 1-2, RA has pitched more like a 3-4 when he was brought in here to be the ace, Buehrle has been what he is, and Happ is just a No. 5 starter. They should have enough depth next year with Hutch, Drabek, Nolin, Stroman, Redmond etc instead of having to start Ortiz or Wang if there's an injury.
Overall, the team needs better starting pitching, and they need to play better sound and fundamental baseball all around.