In my company like most airlines, any change of FMA must be called and the PNF must acknowledge by a verbal "check". But that check from the PNF is irrelevant cause we all know sometimes the PNF will call "check" and not actually look at it. xD
I personally think that the less we talk the best it is in the cockpit and you feel less fatigue. When I flew single crew I was not talking loud it does not mean I was not doing my job properly. Same as in an Airbus, I don't feel the need for the PF to read it loud the FMA for me to actually check the FMA. We have been trained to monitor and understand it all the time isn't it? Like a captain told me once:"Never keep your eyes away from the FMA more than 5s" But well, I'm not an expert and if reading the FMA loud has been proven safer, then well let's continue this way then.
