A very long time ado, a to long time ago actually, I had two M5 and one M3.
The M5's both ware very smooth in doing everything, the M3 was somewhat less 'smooth'.
In the same period I had tree Pentax LX which were, to my very personal opinion, the only cameras who could stand against my Leicas in mechanical precession and even optical quality (yes!).
The Nikon F1 and F2 couldn't stand those two brands, again to my very, very, personal opinion and experience.
But I never bothered about the more or less 'rough' film transport, regardless the brand of cameras nor the film. Actually, it gave me a sense of certainty that there was a film, it transported and the whole thing worked as it should be!
By the feeling and sound, I could somewhat 'knowing' wat was going on inside the camera...
And when the sound and feeling was somewhat different than usual, it was a signal to check the 'thing'.
If you feel the film is transporting, wether hard or not, the be happy it is!
In a way, I could compare what I encountered with my British Leyland Mini I had in the early '80s.
There was always oil dripping out forming a little puddle onder the engine.
After a while it annoyed me and a went to the garage to get looked at it, but there I got a strange conversation with the mechanic:
Mechanic: so, is there oil dripping out?
Me: yes.
Mechanic: then be happy as it shows there is still oil in it!
I went home and never bothered again...
A few weeks later I crossed, newlywed, the at the time very rough and inhospitable Plateau de Larzac via thouse small medieval 'roads' swinging around the sheep flocks!
The Mini withstood the roughness (as wel as my marriage)!