Losing anyone on the roster, is not good. But the OL, did not take any measurable hits, and is not struggling because of the play of these two players, and the OL will not have the same struggles next year based on the 2015 recruiting class.
Other than that - I hope that whatever injury Pruitt sustained is not something really bad, because it seems on the surface that his playing days have ended pretty much involuntary due to that, and that whatever led to Paull leaving, the decision seems on surface to be voluntary, so I hope he had good reason and counsel.