Hi!
I've always been in love with mmorpgs and recently heard about this project and I have to say that it looks good and I appreciate that the developers are so open to listening to their community.
One of the ideas in the talent system that I liked the most was in Blade and Sould, which allowed you to improve skills by choosing different effects (for example, a skill that hits and deals damage can be improved to apply a slow effect or a bleeding, a heal that can be improved to heal stronger if the target is stunned or apply a small dot whenever he heals...)
Here some example:
https://static.wikia.nocookie.net/blade-and-soul/images/a/a4/Skill_trees_02_Skill_Window.jpg/revision/latest/scale-to-width-down/900?cb=20150916182533
Perhaps adding the possibility of evolving skills even in a more simplified way (2 possible choices per skill would be enough) can give a lot of play when it comes to focusing your character to be more support or pure dps or something hybrid.
These skill upgrades should be easy to change (perhaps in safe areas). I think this system would give a lot of freedom to how you want your character to use their weapons according to certain encounters.
In addition to this, it would be nice to add some kind of talent system.