I always liked decentralization, still now but for some reason the game of decentralization also occurs to have some serious problems in such cases that- if an evil power/miscreants consistently damage others using the sole command and power vested in his hand, ransacking others and their freedom illegally, then it gets to a complete chaos, since there is no centralized system to take action for it.
Hive has seen such things but the subsequent response wasnt really enough to curb the problem and ultimately for the reason, quite a large number of identity holder lost their balance and comfort, I think that problem should also be counted.