zanzibar: <Caissanist> Maybe I wasn't be as clear as I could have been. Let me try again.
First, one point that could cause confusion is one you raise, that <CG> doesn't write its own PGN.
That's true, but for the moves (in the sense that you wrote). The names of players can be, and often are, changed by <CG> during the submission. For example, all the games for the Dubai Blitz WC come from the Dubai site - which is a FIDE site, and uses FIDE names for the players.
But <CG> will map the FIDE names to it's own names for every player. Sometimes the names are the same (except for the <last, first> format FIDE uses of course), but sometimes they aren't.
Examples from Dubai 2014 range from trivia:
<A Moussa Othman> vs <A. Moussa Othman>
<Alexey Aleksandrov> vs <Aleksej Aleksandrov>
to the conventional:
<Le Quang Liem> vs <Quang Liem Le>
<Lu Shanglei> vs <Shanglei Lu>
to the increasingly complicated:
<Mohamad Naser Al Sayed> vs <Mohammed Al-Sayed>
<Vladimir Fedoseev> vs <Vladimir3 Fedoseev>
But the basic idea is that <CG> has a formal name for each and every player, which is unique to <CG> (and thus can be mapped into FIDE's names).
* * * * *
With that long intro we come to the crux of the problem, which I may not have explained well.
The problem is that <CG> actually has two names for each and every player. It has a long name, as discussed, but it also has a short name.
The short names are not unique in some cases, or are, as I sometimes find, confusing for various reasons.
The short names are basically intended to save space for cases where the context provides clear indication of the player's actual identity.
So, <E. Iturrizaga> is the <CG> short name. While I might have a preference for a different short name, the critical issue is that the name in a PGN should never be the <CG> short name (imo).
Well, ask <CG>. Generally, it isn't used for most players. Instead, the long form of the name is what you find when you download the PGN.
However, there seems to be some algorithm at play, where <CG> determines some long names are too long - or maybe too formal - and so decides to use the short name.
Now this may be OK for a famous player like Capablanca but for a generic player it strikes me as underspecified - and therefore problematic.
I want the PGN download to use <Eduardo Patricio Iturrizaga Bonelli>, i.e. the name at the top of the player profile - always!
In this particular case, it's perhaps true that the long name is overspecificed. Contrast it with another example: <Jose Raul Capablanca> vs <Jose Raul Capablanca y Graupera>.
But even Capablanca pgn files from <CG> use <Jose Raul Capablanca> and not the short name <Capablanca>.