Is Nutro's Natural Choice A Quality Dry Food?

We recently adopted a 16month old Maine Coon and after finally finding food that agrees with her stomach I just want to ensure that it's a quality food. From reading through the forum there appears to be a good amount of debate about what type of food to use but after the last few weeks I'm afraid to switch her off dry.

From the day we took Rita home from the breeder she was experiencing soft smelly stool and flatulence. After several visits to the vet including de-worming and de-parasiting despite negative stool samples (stool had some blood in it as well), which resulted in bad diarrhea and several baths, we finally have a handle on her tummy issues. She stool is still on the soft side but now it is at least shaped (and massive!).

Rita is currently on a daily probiotic and a tablespoon pumpkin which she LOVES. The dry food we're currently feeding her is Nutro's Natural Choice Duck & Potato Grain Free Cat Food.
Ingredients:
Duck, Chicken Meal, Pea Protein, Chicken Fat (preserved with Mixed Tocopherols), Dried Potatoes, Potato Starch, Split Peas, Duck Meal, Dehydrated Alfalfa Meal, Dried Plain Beet Pulp, Potato Protein, Natural Flavors, Soybean Oil (preserved with Mixed Tocopherols), Potassium Chloride, Choline Chloride, DL-Methionine, Salt, Taurine, Vitamin E Supplement, Zinc Sulfate, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Iron Proteinate, Yucca Schidigera Extract, Vitamin B12 Supplement, Copper Proteinate, Niacin Supplement, Selenium Yeast, Manganese Proteinate, Biotin, Riboflavin Supplement (Vitamin B2), Calcium Pantothenate, Potassium Iodide, Thiamine Mononitrate (Vitamin B1), Vitamin A Supplement, Pyridoxine Hydrochloride (Vitamin B6), Vitamin D3 Supplement, Folic Acid, Rosemary Extract, Decaffeinated Green Tea Extract, Spearmint Extract
Guaranteed Analysis:
Crude Protein (min.) 36.00%
Taurine (min.) 0.18%
Crude Fat (min.) 19.00%
Ascorbic Acid (Vitamin C) (min.)* 50 mg/kg
Crude Fiber (max.) 4.00%
Docosahexaenoic Acid (DHA)(min.)* 0.06%
Moisture (max.) 10.00%
Omega-6 Fatty Acids (min.)* 4.00%
Calcium (min.) 1.20%
Omega-3 Fatty Acids (min.)* 0.30%

Vitamin E (min.) 250 IU/kg