I guess it's sort of nice that the Dragonshouts have to actually be combined in order to use, but I can imagine how much of a pain it will become when you get into learning a lot more of the dragon language. If you are going to have something that complex though, why not call the player to go above and beyond? What I'm saying is having the player learn to understand Dragonspeak in a rudimentary way. This is not to say that Skyrim becomes a sort of Rosetta Stone for nerds but instead it means that the basic phrases we learn in order to use Dragonshouts become the baseline for understanding dragons. It has been confirmed that draons speak, so why not have them actually speak in the way they are meant to speak.
I recall a side mission in the game Knights of the Old Republic where you had to deduce an alien child's speak from the actions that went along with the dialogue. This involved a lot of trial and error and an inability to fail, but it felt rather satisfying after I solved this particular puzzle. Skyrim does not have the same sort of dialogue system as KotOR though, so how could this be implemented? Well first off I'm going to make another assumption here based off of scant evidence. It is said that there is a Dragonshout that will allow you to summon a dragon. I think, from this, we might be able to keep said dragon (or some unsaid dragon) as a companion through the game. Basically the situation would go as thus:
The dragon companion, when prompted, will speak to you in Dragonspeak as well as having the subtitles in the Arabic spelling of Dragonspeak words. After it is spoken, there will be several dialogue options (in English) of things that you guess came out of that conversation choice. If you guess something wrong, the dragon will say what a buffoon you are in his tongue and you will have the chance to try again until you get it right. It's a rudimentary system, but it would slowly teach you about your companion and about dragons in general.
I, personally, am just going to smile with glee when I see people writing novels in Dragonspeak and yelling "FUS RO DAH" at conventions. If they pull off this intricate language well, then it could well be a new phenomenon that will overtake the RPG crowd. As it is right now, I can imagine many directions they could take this concept which is core to the game and make it into something that is really lasting and memorable. Anyone else have any ideas to the extent of the dragon language? Will you write a book in Dragonspeak? Post below!