Look, the reason why there's a fuss about the instamine, particularly the core feature change, as a high coin ouput isn't nefarious(Look at bitcoin) is because it's the things like the block reward changing and such that's what everyone is getting on about, especially since those changes drastically benefitted the early instaminers.

These are decentralized, and may I put emphasis on it, DECENTRALIZED currencies. They cannot afford to have centralized screw-ups like what happened with Dash's instamine. There is no central authority that can just get rid of those instamined coins, so that makes it all the more worse. With a decentralized product, it needs to be somewhat "fair" and "credible" and such.