Ashley some months ago, i made flashlight mode in my retro game, when i use force texture, it resulted like 40-80% CPU and average 27 fps. Sometimes it may cause spike lag.
Then, i made a fake sprite like black image with alpha hole, without using force own texture, it resulted 10-30% CPU and average 59 fps.
There a lot of tests, using force texture it could consume a lot of CPU on mobile devices may lag, but i can't remove a layer in runtime.