I’m supportive of adding support for renZEC. There are many Storage of Value type token (whether privacy or not), but many of them tend to have fostered a maxi-type culture. From my experience interacting with the ZEC community, they give off a much more open-minded and positive energy.
I can’t comment on wZEC as I haven’t reviewed or assessed their custodial design and potential risk. (Not saying they are risky, I just haven’t looked into it myself).
I believe there is strong opportunity for growth of ZEC on ethereum… especially once they’re able to participate in yield farming activities such as Curve pools.