Lol. It's change into fundamental structure of a coin, which require hard fork, which is in fact change of consensus rules, of given inflation.
As I say it's change of consensus rules.
Do as you want, it's a not trustless consensus, if you change inflation rates after 3 months of launching blockchain/dag, just because you want to lower it (some group).

It was designed, as it was designed. I dont see any major cryptocurrency that changed their inflation consensus rules. Nor Bitcoin, Litecoin, Ethereum, Monero, Peercoin, nor any of the known currencies for me. Only shitcoins or erc-20 do such things as burning coins or tokens, or changing inflation.