We are currently using this API among others and we are looking to update our system to support the new 3dSecure 2.0.
Currently, we support 3DS Secure 2.0 using existing XML fields, so no change is required at this time. Unfortunately, that does not mean there won't be changes in the future. I believe the network mandate does not require support until October 2019 and we have several questions and requests for clarification that we've sent to the networks. Depending upon their replies and/or changes to the requirements, we may have to add new fields to the schema.
I hope that helps,
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