Hi, I noticed the clutch is slipping and went to see a mechanic, there was some newbie guy there (probably doesn't know much) and he said yes the clutch is slipping and they can replace the clutch kit (exedy). But reading more over here I realised that there is possible something wrong with the hydraulics, because the clutch is engaged low on the pedal and sometimes thudders, and this could be a symptom of low hydralic fluid or leakage.
So I wanted to know if someone can tell me how I can get an expert opinion on this, should i go to another subaru repair workshop and how would this be fixed - the hydraulic issue?

Cheers,