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The more information released about this game the less enthusiatic about the game I get. I'm not going to go into a rant about it here, but from my understanding the skill system works as follows. I could be completely mistaken as the information on this is limited and fairly obscure.
You gain experience just like in normal MMO for killing creatures, completing missions, and possibly other sources. You have an experience bar just like in other MMOs. When it fills out you gain 3 Ability Points and 1 Skill Point.
You have ability tree paths which unlock various abilities from chakras and weapon skills. If I'm not mistaken in the ability tree some abilities cannot be unlocked until you've unlocked previous tiers in the tree. Abilities start costing more and more points to unlock the further down the tree (or wheel as it called) the ability is, costing upwards of 30 points for the more powerful abilities. There are 588 abilities in all. While the options here are quite flexible, I don't personally find it much different than the classic level systeming in other MMOs where you invest in talent trees and unlock abilities as you level up. Can we really call this a levelless system? Obvious there will be a point where I maxed out and reset the experience bar (trying not to call it leveling up here) and gained enough ability points to fully unlock a role, thus maxing out my potential in that role. This is the same as hitting max level in a MMO!
Skill Points enhance your efficiency with certain weapons or chakras. There is a limit to how far you can advance each weapon/chakra (I think I heard a seemingly random number like 55), but essentially aren't these just like leveling up in other MMOs? There will be an obvious difference between a player with 5 points in Assault Rifles and a player with 55. Isn't this just another form of vertical progression? Again, you hit a point where you maxed out a particular role and are now able to play that role with the most efficiency compared to someone who just started putting points into that role.
I don't mind that they have vertical progression in the form of gear, but it looks like the skill system also has vertical progression. Though there is a point where you will be able to cap in that progression (just like in other MMOs) on any path of the trees, but isn't that system just like FF MMOs where you can level each job individually? Maybe the key difference here is you can work on progression in any role from any role without having to be in the role you are working on progression on, but still why call it levelless when the system clearly has defined vertical progression through a point system?