Hi tgrafix,
I’m not surprised that using 32 ILD for all three layers would be on the firm side for many people (particularly if they are side sleepers in average weight ranges).
The most effective way to make the mattress softer and add additional pressure relief would normally be by adding a topper. There are some topper guidelines in post #2 here and the posts it links to that you can use as a reference point to help you choose a topper that has the highest chance of success.
Phoenix