Is this the same for all hive-engine tokens?

Yes

Is there some way to make it decentralized?

Not without native smart contracts on Hive

There is no need for any changes as far as I can tell, so I wish there was a way to remove myself as a single point of failure.

This will remove you from the distribution. Scotbot uses the active key of the primary account to distribute tokens, the newer method uses a "smart contract" to distribute rewards,some how bypassing the new for your active key to transfer tokens. You still have the ability however to mint and distribute tokens outside of the contract as the active key owner. The net change really isn't that much different, it's just you have less features, like I don't believe the new method can mute content or do front end penalties.