There are some genuine issues (data privacy, redundancy, data usability....) that you have mentioned in WP. But, are you addressing the issues related to fraud and data leakages as well.
Yes, we have designed the ETH Travel token architecture for non-repudiation and fraud analysis as well. Its transparency, security, and immutability which do not allow unwanted deletions or transactions, scam or fraud are also important in the travel industry.
For more understanding, please read our whitepaper at
https://ethtravel.io and let us know if you have any questions.