Nice going. Best of luck to you.
Not too bad, but drinking 1/2 serving pre and post workout might be a little bit too small of food intake. Pre-workout is fine, as you don't want a huge meal sitting on you anyways.
However, Myoplex contains a blend of proteins designed to be slow to digest, so perhaps replacing this with maybe a scoop of whey protein isolate taken 30 minutes before your workout would be better. Or, it may make no noticeable differences. Try it and see how you feel.
Post workout, Myoplex is too slow to digest to be OPTIMAL. Notice I said optimal. Ideally, post workout you'd have something a little higher in carbs, and a faster acting protein source. Something like Surge, here at the Biotest store, would be ideal.
Be mindful that all of this depends on your dietary approach. Super low carb? Just reduced carb, reduced calorie? It all depends. Lots of roads will get you to where you want to be, some just faster than others...
No shit it is.
No, don't buy soy.
IDEALLY, you want your meal replacement shakes (those to be used as meals) to be a blend of slow and fast digesting proteins (except for pre workout.)
Also, you may have faster results if you adopt a lower carb, higher fat, more moderate protein approach. Personally, I've had good results using this method, while maintaining all, if not even gaining, some muscle mass.
Basically save your carbs (starchy) carbs for post workout, perhaps one serving in the morning (like your oatmeal.) During the rest of the day, its protein and fat, with equal amounts of calories coming from both protein and fat (credit to CT.) With your meals, try to have GREEN veggies (brocolli, spinach, cucumbers.) Leave everything else alone.
BUT...you don't have to do this. Simply eating a balanced diet will get you good results too, but again, I'm always thinking of what's optimal versus what is suboptimal.
As far as your shakes go, is Metabolic Drive, which they sell here, an option for you? Good price, excellent taste, excellent ingredients. Whey is just a little too fast digesting to be optimal as a meal supplement.