It appears the update to the Paladin class (i.e. Retribution) will be delayed until further notice. A Blue post from Vaneras in the EU forum states:
I believe the exact choice of words Ommra used was “this concern should be addressed in the next content patch”, where the word ‘should’ can be translated into ‘is expected to’. Delays can happen, and I think that this is what happened in this case.
Source: EU Paladin Forum