Hi swami,
Most of the initial break in period of a mattress as well as most of your initial adjustment period to a new sleeping surface will have happened in the first 30 days or so in most cases so I would be doing the same thing as you (looking for a comfort adjustment or exchange).
The key is to decide if your comfort layers are too firm and you are looking for softer/thicker comfort layers or whether the support of the mattress is too firm. The first will typically produce pressure point symptoms (numbness, tingling, discomfort in the area where your body makes the firmest contact with the mattress like your hips and shoulders) and the second will generally produce symptoms that are more related to alignment (such as lower back pain or discomfort).
It sounds to me like the issue you are facing is pressure relief on a firm sleeping surface in which case it may be a good idea to consider a mattress that has softer or thicker comfort layers. I would also make sure that you spend some time testing any mattress you are considering exchanging for along the lines of the testing guidelines in post #1 here.
I would treat the choice between different types of mattresses which use different types of support components (such as latex, polyfoam, or an innerspring) or different types of comfort layers (such as latex or polyfoam or memory foam etc) as a personal preference issue and decide on the style of mattress based on PPP (Pressure relief, Posture and alignment, and Personal preferences) and your “personal value equation” rather than thinking of one type of mattress as being “better” than another. I would also make sure that no matter what type of mattress you find is best for you that it has high quality comfort layers because this is the “weak link” of most mattresses and the part of a mattress that will soften or degrade most quickly over time. Of course latex is a very high quality and durable material and comes in a wide range of firmness levels and can be used on top of any type of support component (including latex or innersprings).
Other than making a choice that is “just right” … it’s generally “safer” to choose a mattress that is a little firmer in the comfort layers rather than too soft because you can also add a softer topper to a mattress that will improve the pressure relief of the mattress but it’s much more difficult to “fix” a mattress that is too soft because the best solution would involve removing or exchanging layers from the mattress.
Phoenix