This reminds me of Dungeon Siege where it gave you the ability ro multi class but by doing so the minimum of skill goes up and by not using a pure discipline to sorcery, bows, combat, etc would eventually force you to choose or you became increasingly weak. This is similar.
In CoE its all about skill management and not getting sucked into going into multiple professions or weapons as much as it is about trying to maximize your skills in focused areas to be stronger then other people and keep up with old souls that have skill ramps on their side. You could be a farming, blacksmith, and a swordsman but you would suffer from it at some point and it would take longer in all three to get good at each if you spread yourself too thin.
I think it should be more possible to just master a single weapon and all associated moves for it and be legendary in a specific weapon like longsword for instance.
You could also branch out and be legendary in all 1h swords and be legendary in them all at some point.
I dont think you will see many multi or all weapons lengendary combat people unless you are an old max soul, ward/family memer, neran, soulmate, talent, and luckily born in a combat academy that has masters from all tribes teaching everything in one location. Maybe then you could master it all in one lifetime if you skill ramp to the max the life after you have mastered each individual weapon in previous lifetimes.