As news goes, it's kind of a mixed bag. The extra security for the network is always nice, but it doesn't ready aid decentralisation if a single group is in charge of a significant number of full nodes. Provided that lots of prominent companies in the Bitcoin space do something similar, then it's good news. But if the overall nodecount continues to decline while centralised groups have a larger percentage of them, then it has the potential to be bad news.
I am sure more Bitcoin related companies will help the network with adding full nodes. As you say, it might be a problem if the amount of full nodes are decreasing and only a few entities are left with their nodes, then decentralisation is as good as gone. But I am fairly sure that several parties will prevent that from happening by adding their nodes to the network.
We can also add an extra layer of network protection by letting our Bitcoin Core clients open. I am running a full node for more than a few months, and it feels good. If I am to buy a VPS or dedicated server when I need it, then I will install a full node there as well.
