Agree that an enthusiastic and experienced PPL'r with an FI rating is tens times better than a CPL'r with 300 hours simply doing it for the hours. Besides which, there's no money in PPL instructing anymore anyway so what does it matter?!
But be prepared to lose what remains of the old self improver route for career pilots.... now that seems a shame as not everyone can afford Oxford (and hence straight to shiney jet).
VFE.