I have to mix pea protein with a flavored whey because the taste is awful!
Here you go. Stumbled across this while studying. http://www.nutritiontactics.com/measure-muscle-protein-synthesis/ and then if you go to 7.2. The article is written by Jorn Trommelen who is a lead scientist studying muscle protein synthesis. As you can see plant based proteins don't trigger the same response as animal proteins because although they do have all of the essential amino acids, they simply don't have as much. You can offset this by simply consuming more of it though.
No offence but I'm not taking time out of my day to back something up which has been widely accepted at least as long as I've been body building. That's why almost all protein companies offer a blend of pea, rice and soy. Rice contains a lot of what Pea lacks so they make a good combination. You could chug down a pea protein shake with your dinner as you're suggesting, but most people use shakes as a supplement for when they don't have access to real food, at the gym, or work. if you're at home and access to real food you should be eating that.
Can you back that up with any scientific studies? If this was true, the only way the protein would "go to waste" is if you consumed no other food containing the low amino acids that you haven't detailed, which would be highly unlikely
yes, technically it does contain all essential amino acids. however, its very low in some of them which means alot of the protein goes to waste.