Hi Adianez,
Welcome to the Mattress Forum! 
When they were purchasing their latex from LI (now called Talalay Global) it would have been some version of Talalay latex (blended or natural) but if they are now purchasing from India it’s probably from CoCo latex which makes 100% natural and organic certified Dunlop and is fairly common in North America.
If this is correct then latex doesn’t “melt” with heat so there would need to be something in between the layers that can melt and bond them together. It’s possible that they are using latex glue but of course I don’t know the specifics of what they are using to bond their latex layers together.
There is more about the “value” of a mattress purchase in post #13 here that can help you make more meaningful quality/value comparisons between mattresses. The “value” of a mattress purchase is always relative to other mattresses you are comparing it to or that are available to you in your area or online (for those that are comfortable with an online purchase) but on the face of it and assuming that it’s a good match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) and all the other parts of your personal value equation that are important to you then it certainly seems to be in a very reasonable price range.
If they no longer use wool quilting then the only fabric in between you and the latex would be the cover and the fire barrier they are using and any quilting they may be using in place of the latex.
Wool is a great temperature and moisture/humidity regulator and most people do well with it even (and sometimes especially) in hot and humid climates because of its ability to regulate temperature in both directions to maintain a temperature and humidity range that for most people would be “neutral” Having said that … there are also other factors that can affect sleeping temperature as well and some people can be uncomfortable in temperature ranges that would be “temperature neutral” for others. It would also depend on the specifics of the wool quilting and it’s thickness or density.
Wool can be used to regulate temperature in the arctic and in the desert but it would be used in thinner layers in colder climates because it can insulate as well as remove heat and moisture/humidity away from the body. There are also many other variables that can affect temperature regulation as well including the type of fabric or tick that is used in the mattress and your mattress protector, sheets, bedding, and your bedclothes as well. It may be that they are using a lower cost quilting layer (or no quilting at all) to save on the cost of materials and then are using feedback from the “exceptions” to justify removing the wool. For most people a thinner cotton cover that doesn’t have any quilting and that allows you to sink directly into softer latex comfort layers would generally sleep a little warmer than a cover that was quilted with wool because even though latex is one of the most breathable foam material … wool has better airflow and wicks and stores moisture away from the body more effectively than latex or any foam material. Again though I don’t know the specific reasons or experiences that are behind what they told you. There is more about the many variables that can affect the sleeping temperature of a mattress relative to different people in post #2 here.
Phoenix