Eating too much protein is like having a huge pile of bricks and not enough energy to stack them up.
At 210 you probably could up your protein to 400 g/d and see
additional benefits. You should, however, be eating at least half as much again (600 g/d) in carbs and around 100 g/d fats. If not then your body will just burn the protein for energy, which is a real waste of money - not to mention your digestive powers. To get the most from protein absorbtion, try eating VERY regularly, and ingesting about 25 gram per hour. Right after your workout drink a protein shake with 80g whey / 100g sugar / 10g Creatine. You may also notice benefits if you improove the protein quality as opposed to quantity - ie chicken vs tuna, whey vs chicken, etc.