honestly, kafra flying is the least interesting system RO2 has. What about life jobs? the new card system? the homunculus-style guardian summons? The ability to vend while offline?
Kafra flying? Isn't that just RO2's transportation system, like WoW's flight masters?
The life jobs are so-so. Currently, it just seems to be RO2's glorified profession system. The new card system is probably the most interesting feature that I've seen so far.
Opinion about the new RO2:
It felt generic from the beta test. It's got an interesting-looking system or two (the Kafra flying, maybe), but other than that it's just any other 3D MMORPGs you've played so far, really. Didn't helped that I got into Lime Odyssey's alpha and the two games' concept is ...very similar, to say the least, with LO being a way prettier game with more fleshed out systems. I liked the old RO2 better.
Every 3d mmorpg is going to feel similar to one another, some in more ways than the other. However, there are fine little details to pay attention to aside from whatever little gimmick each game has, such as how the controls, movement and combat feels, and even just the story. There are quite a large number of people that play(ed) WoW for its (steadily declining) stories and learning about the game setting's lore.
WoW had some of the most fluid movement and combat in a 3d mmo I've experienced so far, while Aion felt sluggish and was just an updated and glorified old style Korean mmorpg. WoW even used to have some platforming elements in some of their earlier dungeons. Unfortunately, these are absent from later dungeons. SWTOR has datacron searching, which is essentially an exploration and platforming sub-game (which isn't entirely pointless, since they give permanent stat boosts once found).
For an obscure free-to-play one, there's Kingdom Heroes. The movement and gameplay was rather simple, and definitely didn't feel like WoW (more clunky than WoW), but it still ended up being a fun game to play. It also had the closest thing to a large scale WoE in a 3d setting. Based on the Three Kingdoms period of China, players could join 1 of 3 factions. If I remember correctly, every wed and sat (lol RO WoE days), you could attack cities to claim them for your faction, but more importantly, for your guild. At the end of each siege, the guild that holds control of the city gains all the gold that it accumulated from taxes since the previous siege.
Included in this game, was a siege weapon system to break down city gates faster, a bodyguard system so you could have the feeling of controlling a small squad of soldiers in a large battle, mounted combat (every class could ride mounts and fight from them), and some pretty epic navel combat that wasn't just a gimmick or a transportation method. There was also the Martial Spirit system, which granted your character the strength and abilities of great Chinese generals (that showed up in the game). Sadly, aside from a few minor balance issues, that game was a money sink worse than the Kafra Shop and was still a grindfest (lol afk leveling with bodyguards ftw).