1 - for pax, a "ping" on the recording, I am sure it was done, if it was rough, quite possibly much earlier, if it was indeed ever switched off / for crew . . if some real nasties were anticipated, normally a conversation on the inter phone, or, in extremis (never been there personally ) "CC be seated immediately " or suchlike on the PA.
2 - not neccesarily a call out, with TAT colder than -40c, TAI not required on a B737, don't know for A320 but, same engines, so would imagine similar, ignition is normally "Auto" so crew action only required in severe turbulence
3 - if it is rough, agreed "may" be some verbal discussion, but most companies PF may make adjustments to speed without verbal confirmation to the other crew member.
4 - Good luck with that one. . . .
5 - there may be some discussion about which way to turn, and, normally, a request to ATC to do so, but. . .it isn't a bloody hollywood movie FFS, so, lack of "verbal annunciation", should not be interpreted as "asleep/not paying attention/not on the case". . . . Are you a current/rated/practicing/member of crew/Jet Transport ? if not, well. . .you are, a bit of a "clutter" on a semi-serious discussion. . . .as bloody usual on pprune
