it is a bad design. You havent considered that the transaction fee will increase by time. We should just reduce the inflation when tx fee increase.
Bitcoin have a better money rule than ETH and AE
aeternity will not be depend on the ethereum blockchain once their main net launch so theirs will be no problem in the tx fee also I think AE will set a lower transaction fee in every transaction made on their platform.
We have to wait until we get information from the team, did the team announced when they are going to launch their mainnet? It is very quite interesting because now developers developing their own blockhain with smart contract facility.