Ok mate, for me it's really strange, when I installed your ROM, I did a clean install. When I try to set the voice get FC. I will do a new clean install to test again. Thanks for your work [emoji6]
Use Kernel Radiator and you can adjust vibration yourself as well as adjust kernel settings
My battery is the same as it's always been on Nougat. The only change I've made is running FrancoKernel instead of Despair that comes with this ROM.