Well, replacing the senior management is hardly a surprise, any incoming CEO would do that and they will hunt where they came from to find them.
If he had come from IBM, they'd all be his mates and contacts from IBM.
Whether or not DXC is Accenture (and it isn't) is largely not relevant because he wasn't CEO there, he was several levels lower down than that.
What you can see from him is that his BPO background stands out. He's all about trying to improve customer relations and improving morale. That's it, that's his strategy.
TBH those things are some the biggest problems from the previous regime, so I don't think he's totally wrong.
However, it needs a bit more than that and I think by now we should be seeing what the next thing is.
The only thing I've seen coming is the re-brand.
Not sure if some different letterhead will make much difference.