Simple enough. Create something that you, personally, would like to see on the market. Something custom suited to your tastes. If you want, explain your choices and your exclusions.
We have a fair few backseat formulators as well as Actual formulators on the boards here, I think it’d be fun.
I’ll start, unless someone types way faster than me.
Intra-workout.
25g Cluster-Dextrin + 25g other less expensive carb source, WMS is fine
10g whey isolate
5g leucine
2g PeakO2
2g potassium
1g sodium
Maybe some LCLT too but that’s really just icing on top.
Low dose whey + added leucine. Nice. I used and enjoyed low dose WPH with added leucine for a while (IntraMax had that combo). Either that or EAAs + added leucine is my go-to intra-workout amino preference. I tolerate Gatorade powder for carbs fine, so I save some money using that over fancy carb sources, plus it covers flavoring too. Toss in a gram or two of taurine for good measure and that’s probably enough for me most of the time as far as intra-workouts go.
The following study was admittedly supported in part by the Gatorade Sports Science Institute, but it seemed to find that 6g EAAs + 675ml of a 6% carbohydrate drink (Gatorade), which I think is 35-40g carbs, was superior to EAAs or carbs alone (and superior to placebo, of course) in regards to increasing strength and fat-free mass, but did not lead to an increase in fat mass (placebo, EAA, carbs, and combo groups actually all lost fat mass, and, while there was no significant difference in fat mass between groups, the combination group actually lost a bit more fat mass than any other group).
So if you concern is regarding body composition, I don’t know if I’d sweat having Gatorade intra-workout if you tolerate it well. But that’s just me.