The biggest issue is that the attestation hardware and the application client is the same device with the same manufacturer, who also happens to have a slight conflict of interest between monetizing customers and preserving any sort of privacy.
IMHO the pro-attestation forces are so overwhelming that we should all cherish the moment while we have anything open left.
Since Apple and Google are public companies I guess we should all buy stock and reap the financial rewards of destroying computing freedom. >sigh<