Rpi3 optimizations?

Hello,
i’m setting up a new rpi3 with latest OSMC coming from an old rpi1b with raspbmc and was wondering what ar ehte optimization best practices for the RPI3?

for example the osmc config shows the hdmi drive in 0, but the tooltip says that for rpi2 and above to set it to 5 by default?, but why is it in 0 then after install?

Same with the GPU partition, do i leave it as is?, or do i select the one that says for rpi2?

why is hdmi_ignore_cec_init=1 set?, shouldn’t CEC be enabled by default?

What tooltip? Where are you getting this info? cec_init does not disable cec. http://elinux.org/RPiconfig

Leave it all as is