If you were injured, it might be wise to increase protein intake slightly to provide more raw materials, although if you are on 4 shakes a day it doesnt seem necessary.
I would also increase fruit and veg intake to get more micronutrients. Continue to supplement with creatine as it causes the muscle to swell slightly, allowing a better transport gradient for nutrients to travel into the injury site. Creatine may also prevent strength losses usually associated with injury.
I would also increase glutamine intake to assist the immune system in repairing the muscle. You may or may not want to add some GH secretagogues, such as arginine and ornithine into your supplement regime too – arginine also acts as a vasodilator, allowing more blood to travel to the injury site, potentially improving healing. Fish oils may further limit inflammation.
Overall, I dont think it is wise to “eat more” – although theoretically providing more calories to your body should increase growth, I have found that in practice this isnt necessary, and you just end up getting fat.