Hi LEW,
I was on their site only a couple of days ago and thinking how much I liked their new site format and they were both still there. Their removal seems to have been very recent.
Latex doesn’t soften during the night (although it can feel softer if we become more fully relaxed which is why testing mattress in a fully relaxed state can be so important) so I really don’t know if this is actually happening or if its your perceptions. Either way though it is affecting you which is what is most important. Post #2 here may be helpful to help you evaluate what may be happening or at least make sure that it is the mattress and not something else (such as the foundation).
I don’t put a lot of faith in online reviews (even though they appear to let people say what they want and don’t edit them) because you never know all the circumstances, body types, or details behind them. Sometimes people talk about “compressed areas” when they really mean that the mattress is just too soft for them and they are sinking in too far and they made a comfort choice that wasn’t suitable. Other times many people talk about how soft or firm a mattress is and then someone buys it based on these reviews and finds out that their perceptions or interaction with the mattress is very different. They can be helpful when they talk about the service of a retailer or in some cases when they identify clear patterns but I would never put too much faith in other people’s “comfort reviews” because each of us can be very different from any “norm”.
Latex layers can also have manufacturing defects on occasion though (and I have talked with manufacturers where whole truckloads needed to be replaced because the latex was defective and in some cases quite obviously) so this is always a real possibility as well.
I know that neither the Snowmass or the Aspen are particularly firm in the support layers (32 ILD) so this could also be a factor as well. The specs of both for reference are in post #17 here.
I would eliminate the possibilities in the post I linked and talk to them about what may be happening though. No matter what the cause … your experience is a mystery that needs to be solved.
Phoenix