The market is already saturated with every type of Sherman. If the manufacturers are trying to figure out what to do with Sherman suspension sprues I'm ready for a new M10! Hint...hint.

Hey I would love to see an M10 and M36 too but I suspect that Tasca being a relatively small company versus one like Tamiya and Dragon have to design their product that makes the best use of their existing molds from an economy of scale standpoint.
There's a term used in manufacturing called re-purposing which is to say a company tries to re-use much of its existing capital equipment/molds to produce additional products in order to realize an ROI for that equipment. I think Tasca is doing this here with the added investment of producing an entirely new upper hull. Keep in mind too that they would have probably also incurred another cost for the investment they made on molds for their new M32B1. An M10 or M36 would mean a much greater investment in capital equipment/molds (not to mention research and design) and being a small company Tasca may not have achieved their ROI completely on their M32 and perhaps even some of their Sherman molds. I may be completely wrong or partially correct but this is what I have seen in the technology industry.

I think they should be commended for announcing this product so soon after their M32B1 launch.

As long as they are releasing different Shermans which require new toolings for upper hulls and turrets, it would not be any more difficult or expensive to design an M10 or M36 upper hull and turret. Still waiting...!