depends how you treat it, but yes if its slipping there potential for it to damage your DMF.
consider your options and talk to VWR
as Matt says you shouldnt really have had an issue with a std mapped GTI unless its been treated badly so I'm surprised.
maybe you also have a small shaft oil leak which has precipitated the issue ?
fitting std kit should do you fine
, but consider 'upgrades' as well
FWIW my ed30 is now over 30k on its original clutch (>20k of which has been on APR stg1), its never felt right but it still holds!
Have you been the only owner?