As for Monster Hunter, I keep getting different information. At first people told me that Hunter Blade and Monster Hunter are exactly the same game, they just changed the title when porting it. That's I added it as one game. Later people told me it's actually two different games and Hunter Blade is just a copy so I separated them.
I removed Monster Hunter now and just left Hunter Blade.
Fist of Fu - has been shut down
Global Agenda - Open World elements, but mostly instanced aimed.
Brawl Busters - Can't really say it's that action-ish. It's just a spammer as it doesn't require or doesn't have aim and what not.
SD Gundam Capsule Fighter - It's gameplay like GunZ / Exteel, so definitely action, but it's a lobby based game.
Cosmic Break - Isn't this the same style as Gundam? If so, then yes, action and lobby.
Face of Mankind - I would say this belongs more in the true MMOFPS genre (like PlanetSide), but instance based, as zones are isntanced.
Core Blaze - This is also gonna be action, but more in the style like RaiderZ / C9 / Vindictus, so instanced.
No clue about the other games.
You should make a 'true MMOFPS / MMOFPS-RPG' category too. Since it belongs to the Action MMO-genre in a way.
Games to add to those would be; Face of Mankind, Fallen Earth, Global Agenda,...
I'll list more whenever I can think of the other games. I'm gonna edit it in just for now.
Edit; Also gonna add a 3D + Lobby / 2D + Lobby category.
Edit 2; Isn't RaiderZ going to be instanced as well?