Being dominant in chest/back or arms doesn't necessarily mean you will be imbalanced, it's just how your body wants to work. I am biceps dominant on back work, my biceps really want to help me pull, it takes the correct exercises and mind-muscle connections for me to get my back to do work. If I'm not careful, my biceps will give out before my back does, really limiting how hard I can work my back. With time and know-how, I have no trouble "getting to" my back. I have to be careful with exercise selection or my biceps will be exhausted and subsequent exercises will be even more difficult to exhaust my back. The goal is always to exhaust the back before my biceps. Towards the end of my back workout I can use more biceps intensive exercises without an issue because my back is already tired and will give out first.
When I train chest, my pecs always want to do the work naturally, there is no issue or risk of my triceps giving out first.
Put a biceps dominant person on a lat pulldown, and they will feel it in their arms not their back unless they really know what they are doing.
I don't really notice hip structure having an effect or shoulder width, but a back dominant person will have the look of wider shoulders, usually. Hip structure is tricky, wide hips don't mean wide waist, people with wide hips can have very small waists, you often can't even tell their hips are wide if their legs are big enough and they can still have a tiny waist. Same with shoulders, clavicle width can be fairly narrow but with enough back and delt development, you still will have wide shoulders, Phil Heath is a good example. Phil is definitely shoulder/triceps dominant and has trouble developing his chest.
As for bringing up weak points, the problem chest/back dominant people have, is even though they FEEL chest/back exercises well in the appropriate spot, they can still easily overtrain their arms. You don't have to push a muscle to failure to overtrain it, and chest/back dominant people are usually strong in the chest/back therefore they easily can overtrain their biceps/triceps.
I would say being chest and back dominant is ideal for bodybuilding purposes, especially at the high end. Most Mr. O's are 'torso' dominant although there are plenty of exceptions, and it doesn't mean you can't still have great arms, just like being arm dominant doesn't mean you can't have a great chest/back.