Ok for the tuner, looks like you can keep the default tuner for
OFFLINE play if you want. (see screenshot) Just choose KEEP EXISTING UPDATE VERSION. My guess is since it says default OFFLINE gameplay then online would use the latest tuner update but offline would use whichever you choose.
I've been playing with the tuner and adjusting sliders as I do think the goalie play is better with the latest tuner, so it's give and take.