I think schisms are healthy, democratic strategies that lead to resiliency over time. It requires interest groups to play their cards, some will succeed independently, some will fail, and often the schism won't last (the groups will reconcile and merge back together). Others see conflict, and label that as "bad," but this just seems like democracy at work. Democracy is messy and looks chaotic to the uninitiated, but all order looks like chaos to the uninitiated.
With that, I don't see blockchain governance as necessarily "decentralized," but anarchistic (non-pejoratively). Anarchistic governance can lead to complex institutions and centralization, the difference between it and traditional central organization is that participation is always completely voluntary. Most people are OK with letting the Ethereum foundation run the show most of the time, and that's totally compatible with decentralization. When people disagree, they typically organize into interest groups to either convince the current guard to consider their interests, or they schism (in this case).