Hi COJ,
Thanks for the update and feedback … and congratulations on your new mattress 
While you certainly made a good quality choice … your mattress would also be in a firmer range with only 2" of softer latex over a much firmer 40 ILD support core so its certainly possible that it may be too firm for you … particularly if you sleep on your side.
There is more about the initial break in and adjustment period in and some other suggestions that may be helpful when you choose a mattress that feels too firm initially in post #2 here but the good news is that it’s always safer to choose a mattress that is too firm vs too soft because you can soften up a mattress that is too firm with a topper but it’s much more difficult to make a mattress that is already too soft any firmer because you would need to remove and replace the layers that were too soft.
I’m not sure if you have a box spring that has actual springs inside it that flex or a more rigid foundation which doesn’t flex (either wood or steel) but if you do have a box spring that has flex in it then putting your mattress on a firmer non flexing support surface can make a difference with motion transfer that involves larger movements that come from the “bounce” of the springs in the box spring. Your testing on the floor will certainly tell you how much of what you are feeling is coming from the box spring.
I’m looking forward to any additional updates you have the chance to share.
Phoenix