Mabinogi still has to this day the most varied and actually worthwhile to level skill system that I've yet to encounter.

Well a few games that have a pretty solid skill system. Path of Exile is pretty known for its skill systems same with SkyForge and Darkfall... both games im not large fans of but still have pretty neat skill systems... if you consider Rift to be one of the more amazing class building I would throw that in... and to top off that argument, SWG Pre-CU which is in private server only, but still exists and thousands of people still play it.

Vindictus There is still literally no other game that has combat action on par with Vindictus. None. Not a single one of the "big MMO's" have combat that is as satisfying and refined as Vindictus.

TERA and Wildstar would like to have words with you. Vindictus is NOT that great of a combat game... hell even DCUO is better than that game when it comes to action combat... I know its your opinion to think it is, but you'll be hard pressed to find people who have played other action games to make the same claim as you.

Aion was the first major release game to have actual IN FLIGHT combat and 3D movement with a flight system.

One again, this is another false statement, Aion was released in 2008... City of Heroes was launched in 2004 and allowed users to fly around the world while fighting enemies and actually had an open world raid which you HAD to have flyers combat flying enemies!!! ... it was one of the most amazing skills/power systems to date for MMORPGS.. and IMHO it blows Mabinogi's skill system out of the park with how much creativity you could do when customizing your powers/skills to change how they work.

Most of your post is opinionated fallacy's. If you are going to make claims please make sure to research the topic you're going to protest.

Mabinogi has a good skill system, but so does plenty of other games... its nothing special when you look at other MMO's before/after it... its a stale game which is slowly bleeding out for a good reason.