Without a doubt, changes to the Whois system is going to cause major issues for anyone who buys domain names that are registered, especially domain name investors. Not only will it likely become much harder to get in touch with domain name owners to make a purchase inquiry, but it could become more difficult to track the provenance of a domain name. This could effectively make it more risky to buy a domain name from a third party.
From my perspective, drastic changes to the Whois system could make domain name theft an even bigger problem than it already is.
Zak Muscovitch, Interim General Counsel of the Internet Commerce Association is attending the ICANN 61 meeting in Puerto Rico to monitor changes to the Whois system and to represent domain investors and domain owners. With the interim Whois-like system being discussed and debated, Zak is seeking input from domain investors and domain name owners whose businesses may be impacted from the changes. You can contact Zak via the ICA contact page.
If you have any comments or suggestions, you are welcome to leave them here or reach out directly to Zak.