however i think there is more to it than that. this is just opening up the door for them to add new perks and new skills to the tree without forcing people to re-roll.
i mean think about the possibilities
legendary one-handed perks could triple or quadruple damage, a perfect fit for warriors who want to stay true the their build without delving into enchanting
legendary destruction perks could double or triple damage on spells, thus eliminating all of the "destruction is underpowered" arguments out there
legendary crafting perks could double or triple the bonus's from these skills, eliminating the need to use glitches or loops to get OP gear
a cool idea would be to make access to legendary perks limited to the number of times you have "prestiged"(sorry couldnt think of a better word and legended sounds dumb lol) such as everytime you make a skill legendary you gain access to one legendary perk from that tree
the possibilities are endless and i highly doubt this is the end all be all of legendary skills
btw sorry for making yet another post about the new system, i just continue to see people either intentionally or ignorantly looking over the good points of this revamp to the system if a mod feels like this topic would be better suited in another forum or merged with another thread i understand =D