So does that ESC not have logging capabilities? The CC ESC on my 700 I can plug in and get TONS of info. Watts,peak amp draw, ESR, voltage just about everything you want over the entire flight and it even graphs it for you. It will hold multiple flights of data.
I'm getting bogging like that on my 450 and to me I think its my nano-tech batteries. They come down pretty dang warm plus I puffed one of them. I will try getting a better battery and if that doesnt improve it then I will look at the ESC.