Hi Wolf0,
I couldn't open your image at work,

but it sounds valid. As long as the algorithms can be optimized for GPU processing, the hashrate will increase (with the result that the power consumption will rise a bit) This is just a fact.
But I'm pretty sure it's still more energy friendly compared to x11 for example.
If you don't mind: please share the code with us so we can test the results of the optimization. (otherwise I will look into this myself as soon as I have time for it)
Thanks!