Optimization feature for Deferred Technical Preview

The new deferred technical preview has a lot of potential, I congratulate the mojang studios team, however it is still poorly optimized for various devices, especially mobile ones, of which there are many, most mobile players do not have cell phones with modern and powerful processors for Because of the high cost, in many countries cell phones are expensive. My suggestion for the new feature is that they put a button that removes the dynamic shadows, or even the general shadows, keeping the atmosphere realistic, beautiful sky and clouds and perhaps the fog. This would greatly reduce lag, so players could play without dynamic shadows, but with a certain immersive environment. I hope you consider this feedback with care, thank you.