I don't think being a much more seasoned designer necessarily means that you're more capable of doing the job. Maybe it means that you're capable of being a great designer but not a great creative director. He was hired to be a CD.
We've been having many bad examples from younger people coming in and doing sh*t in historical houses but let's not forget that many of these houses were founded by young talents that had the support from the industry even if they were not seasoned. And we also have many examples of more seasoned designers doing a bad job as CDs (Hello, Chanel!).
That being said: never heard of him but he better watch out because he has an extremely hard job filled with great responsibility ahead of him. His credentials on Dries womenswear might benefit him and on JW menswear accessories might enable him with hints of creativity.
And yes, it'll very much probably be more commercial as the house struggles to scale and I'd prefer another person like Haider, maybe. But I'm curious to see his work and what he has in mind. Hopefully he'll bring exciting shows back with great impeccable clothes!