does basic whey isolate work?
No. The hydrolysate takes it one step further in speed of assimilation. Whey isolate still has to go through the digestive process. Hydrolysate is referred to in this study as predigested protein but that's not technically true. Amino acids is what you get when protein is digested and amino acids is the form in which you body actually uses protein. Just like it doesn't matter if you eat a potato, oatmeal or jelly beans, it's all going to be broken down into sugar. Sugar is to carbohydrates as amino acids is to protein. So amino acids and sugar are not digested per se but immediately gets in your blood stream and assimilates. This study claims that hydrolysate doesn't need to be digested and is readily assimilate. Isolate is just a purer form of concentrate whereas hydrolysate has the peptides broken down into smaller fractions.
In addition to sugar and hydrolysate, I would still add creatine, BCAAs, EAA, glutamine and whatever else you body uses for recovery and hypertrophy in the intra workout drink. Might as well if you've using insulin so you cram as much nutrients in your body as you work out. I'd just go easy on the hydrolysate. Maybe just 25 grams and spike that with 10 grams of BCAAs and 10 grams of EAAs. I would think too much hydrolysate might cause stomach issues while training. But that's just speculation on my part. At least I know for sure that the amino acids, like sugar, will just go directly into your blood stream and the insulin will cram it in where it's needed.