Article seems to show why they'd want to further separate from US and create their own system.

This part especially:

"Most of the Russian banks have been cut off from the international payment system SWIFT. Payments for oil purchased from Russia are exempt from sanctions, but payments linked to assets, such the oil and gas projects in Russia, are not exempt, the official said. This permits Indian refiners to pay for the heavy volume of crude they purchase from Russia every month but doesn’t allow ONGC and others to repatriate their dividends."