This is a good thing. It shows that gaming the system doesn't always work because there are always bigger fish than you. That's why Proof of Work doesn't need to be decentralized, it just needs to be competitive and vulnerable to outside incursions.
It depends how you see things.
Yes, the competition should make it stronger but I believe that the centralization make the network much weaker because it create a central point of attack or corruption.
Once 80% of the network is owned by one ASIC farm, you can take it down or bribe them.
Or you can build a bigger farm.