I agree, it will only show it could scale more easy than ETH in the case we would need more.
That is yet to be tested. Ethereum has many times more usage than Hive. Both Hive and Ethereum lack a sufficient long term sharding scalability system. (Although Ethereum 2.0 will significantly improve scalability). The fee structure on both Hive and Ethereum is completely arbitrary and doesn't really represent the true underlying scalability system. Will wait and see of course.