Thank you for your feedback on this concept product. Your concern on cooling the m.2 drives is noted. Since this product is going to a 3.5" space, there is limited space in providing a fan. We will look into if it is possible to have some sort of fan in use for this concept product, but the limited space is a concern. Also, this product would be for m.2 SATA drives, which experience less heating issues due to the cap in speeds under SATA.
As for a connector and sensors for the drives cage, I can pass your suggestion to engineering on this. They can check if it is feasible to have this connector and sensors for the drives trays.
If you have any additional suggestions on this concept product, please let us know and we can check the feasibility of the suggestion.