Are they designed to be like that?
My DT Swiss wheels don't clackety click any worse than my other wheels.
I'm not sure - but Shimano solved the "problem" of noisy freehubs about 40 years ago. Unless they have a tight patent leash on the solution, you have to assume that manufacturers are choosing to use other designs. Are they better than shimano's in some way? I don't know, I'm very happy with my Shimano hubs (and other quiet ones).
I do have one set of (fairly) noisy modern wheels, and after riding/racing them for several years I can honestly say I'd rather they were quieter!
My DT Swiss wheels don't clackety click any worse than my other wheels.
I like the noisy free hubs.
Just out of interest:
- do you like the sound of other peoples'?
- when you're riding on a quiet hub, do/did you like the sound of other peoples'?
- if other noisy components become available, will you want those too?