Sidestepping the debate on routine for a moment (because, while it's my opinion that a split routine like that is pretty terrible for a beginner, I think that if you're working hard at the lifts you do you should still make gains) I think that the diet is pretty awful. There just isn't much in it. Protein shakes are handy, but as a way to get some extra protein - not as a replacement for meals. You can ingest all the protein you like but if you're not actually taking in enough calories, you're not going to get any bigger.