Ignite is faster to switch between games and helps keep your desktop from being cluttered with icons, if you care about such things. It also allows you to switch between game hubs to see news and updates faster than going to each game's home page and allows you to access things like loot chests on games that offer them (GF, EE, SB).
Also ignite also allows for partnered games like RO2, Star Wars and Conan to be accessible to AGE players and, save for Star Wars, to be played with your AGE account and use your AP to use the item mall. It is better for AGE and you to have your game currency all from one site that spread out to different game providers.
DDT:(GS)Shannia - Cerberus/Phoenix | (GS)decoy - Serpent