Just to establish something – I’ve played both games extensively. I like both. I enjoy both, and Guild Wars 2 is by far the better game overall, but there are a few lessons that could be learned from TSW to improve Guild Wars 2.
The Story and Characters of The Secret World are infinitely more interesting.
Even minor quest npcs express more personality in their brief dialogues than any character in Guild Wars 2 (with the possible exceptions of the mentors) does in their entire lifespan.
Funcom’s writing team is on a whole different level. Whoever did the dialogue for the game put just about every other MMO writing team to shame. And that’s unfortunate. Arenanet’s writing staff is talented. It just seems so underutilized. Ambient dialogue in Guild Wars 2 is excellent, but the personal story is just bad.
The Skill System of TSW is more free form
Oh, Guild Wars 2 has better combat. I like the fluid mobility of it. I like the lack of a trinity more than anything, but about the time you hit level 40, you’ve unlocked every skill you’ll use. Changing builds is a chore involving a travel time to respec and a farm for compatible gear. Not that you need to change builds – most professions have 2-3 viable builds maybe. Even if this wasn’t true, there is a general lack of variety in Guild Wars 2 build options because of the weapon system and the lack of weapons for that system – the Warrior being the only profession with a “good” weapon variety.
In The Secret World, your build is a combination of 7 skills and 7 passives from 2 weapons of your choice (consider a weapon to be equivalent to a class, as TSW has no classes and each weapon is a very different playstyle). You can eventually unlock every skill and trait on your character, allowing you to change your build at any moment. Sound familiar? Yes. TSW is closer to Guild Wars 1’s excellent skill system than Guild Wars 2 is.
Why the step down? I don’t know. The largest problem with Guild Wars 2, IMO, is the lack of build variety and the lack of convenience in swapping builds. It’s unfortunate, but the best and most defining mechanic of the first game was entirely scrapped for a new system that can make even a great combat system grow dull simply due to repetition.
Dungeon Design in TSW is (generally) better
Yes, I know Guild Wars 2 dungeons are being redesigned eventually, but it baffles me that most boss fights boil down to being bullet sponges with one-shot mechanics. There are exceptions, of course. Fractals was very well done, but most dungeons aren’t up to par.
The game needs boss fights with actual mechanics behind them – not insta-gibbers with enough hp to make you fall asleep at the keyboard.
That’s about all I have to say on the subject. Overall, Guild Wars 2 is an amazing game in almost every aspect, but it just falls so very short in a few aspects – aspects that an otherwise mediocre game by a mediocre development team managed to provide proper examples of.