The S30 Pro is the device ZWO should have brought to market to begin with, what was the point of the wide angle lens in the S30 if you couldn't use it for widefield imaging, I thought that was the whole point it was put into the device. So no, the price of the S30 Pro shouldn't be much more than the original, and definitely not higher than the S50.
The reason the Seestars are so popular is because of their low cost, if you begin inflating the prices which will happen anyway due to global climates fewer and fewer people will buy them over time. You should support the products for much longer than applying the idiotic apple model of releasing unnecessary models every few months.
