OK, so before opening everything I'll clean and lube that pin from outside, makes sense. In the meantime I sprayed some ACF50 into the cable and I think it helped a lot.
That mechanic I went to seems to pull a leg off me, told me now that to change all the clutch plates would be 300 pounds!
Honestly I have never seen a clutch go with less then 100000km unless heavily abused,I will give the pin cleaning a go this Easter.
Thanks for your help!