I can't really say if I like what SE has planned without seeing it, but it sounds our screens could be getting a lot more cluttered. There's a ton of info per mob and they could get really crazy with it.

I like the names because 2D things on a 2D background can be hard to discern, but it's starting to sound like each mob will also have an entourage of icons tacked on as well. I'd prefer seeing what I need to know as I walk by (will it aggro? maybe will it follow?), and anything else (strength, tactics, party size) as an added set of info when I target it, perhaps in a HUD or side list. If that's a bestiary, I'm all for it.

Each player building a "pokedex" to gather monster info for his/her own private book seems too complex a side-game to add to FF14. Offline wikis have been providing this for over a decade and are much better. They can list all kinds of detail SE might not want in-game, and also testimonials of how others have strategized to defeat it.