Hi tim408,
This would depend on the rest of the design and on how all the layers and components interact together but the only way to know with any certainty how well any mattress matches your specific needs and preferences in terms of PPP would be based on your testing or personal experience. There is certainly nothing inherently “wrong” or “too soft” with this comfort layer but there are so many variables and unknowns involved that it’s impossible to know based on specs (either yours or a mattress) or on “theory at a distance”. It could work very well for some and not nearly as well for others that are in a similar weight range and have similar sleeping positions.
If this is one of the options available to you and if your more detailed conversations with the manufacturer of your mattress indicate that it would have a good chance of resolving any of the issues you are having then it would certainly be worth trying. I would personally tend to wait for a few weeks before making any changes though if that’s at all possible. If it’s not because your symptoms are too uncomfortable then I would strongly encourage you to “talk through” your experience with the manufacturer of your mattress because they will have much more knowledge of their mattresses and the options that have been effective for other customers in similar situations than I would.
Yes … pocket coil mattresses commonly don’t have or need an insulator pad. They are most commonly used with innersprings that use helical coils to connect the coils together.
I really don’t have enough details or clarity about what you are experiencing or the underlying reasons for them to make any specific recommendations. Adding a firmer layer on top of the coils may improve the resistance and support under the heavier parts of your body and “lift them up” but may also reduce the ability of the pocket coils to contour to your body which may reduce the contouring support under other parts of your body (such as the shoulders or the more recessed gaps in your different sleeping position). It could be full length or zoned depending on the specific effect you are looking for but again this would generally need a more in depth conversation to “talk through” your experience and and the options you have available that would have the best chance of resolving any issues you have.
Having said that … a zoned construction can be helpful if the main issue you are having is that your hips/pelvis are sinking in too far in some or all of your sleeping positions (especially with stomach sleeping). This can be with zoned springs or with a “belly band” which would slightly raise the center of your mattress and provide some extra support under the hips and pelvis. Any material can work for this if the firmness is suitable for your circumstances but memory foam or latex can be a good option because it can be firmer and help “hold up” the heavier parts of your body but it can also provide good contouring.
This would be a good idea (I would use a relatively flat pillow) and it may also be worth considering using a pillow under the center section of your mattress between the bunkie boards and the mattress to see if this helps as well and if it does it would point to center zoning as a potential solution. There is also more about zoning in post #11 here.
Its certainly possible although with two bunkie boards it’s less likely but the best way to tell would be if you can sleep with the mattress directly on the floor and compare your experience with the mattress on your bedframe. With these types of issues it’s always much more reliable to try and isolate the issue based on actual experience rather than using theory or “possibilities”.
Phoenix