I'm just curious, has anyone tried this before ? If yes and it failed or it won't work for some reason, could you explain why ? I'll admit i have not taken the time to study how Zcash works but perhaps a few pointers would help me get a quick start and see if it is feasible.
As far as I know all proof of stake coins have the "nothing at stake" problem, which is a bigger problem than any of the proof of work coins could ever endure, which is why I never invested in NXT or any other coin that uses proof of stake. Therefore, I do not see Zcash improving at all by switching to PoS model. Their biggest problem is the supply release, which caused a mega bubble and now an stagnating price, and the fact that you must trust devs deleting the masterkey.