I wish the idriod app would let you listen to unlocked tapes on the go. doing them during gameplay just doesn't work for me as I miss out on half of what is being said because I see something happening and phase out, or worse yet, the damned game plays something over it and doesn't even bother to pause the damned thing so that I end with half a tape missed.
It worked well in peace walker because I could just queue the tapes and stick my psp in my pocket while I was driving or something, but here they just feel so out of place. Audio diaries work in games like system shock and dishonered because you have to find them in the game world, and listening to them provides you with some breathing time in between the action and some in game tension because playing them ups the odds of an Enemy upending your ass when you aren't paying attention. In mgs5 they're just dumped on you at arbitrary times to be played later, and the game is so densely packed with shit to do as is there's no real time to force them in somewhere. Maybe if helicopter rides were in real time, and the distance traveled at least had a simirealistic equivilance with the game's clock, so you could listen to them as you flew to missions and to and from mother base, but that'd be a tough balancing act to maintain without killing te gameplay pacing.