This is a fine summary of the game, and I'm really starting to enjoy the pieces that you've brought to this forum, but I'm a tad disappointed that you didn't mention the inclusion of a score when discussing the music of V.
The radio is alright. I look for a game with a soundtrack to introduce me to new songs, genres, artists, etc. If I were to scroll through some of my playlists now, I'd be able to point out quite a few tracks that have appeared in video games. I found IV's radio stations to be severely lacking and V's to be just a little bit better. There are probably a handful of songs in the latter playlist that I aim to find when scrolling through the stations, as opposed to none from IV.
V's missions were practically narrated by the dynamic score. I don't think they'd be quite as memorable without its epic presence.