So if the Legendary Armor will be released...
No you’ll have to repair
Repairing is not a big problem since it’s free, maybe just a little annoying but nothing more. In my opinion the real problem are runes, I mean I see legendary armor as my ultimate armor so it’s awkward to change runes on it or having a different set with different runes, still I don’t see a way to avoid that :/
Maybe they could make a system similar to wallet for runes but that’d kill runes price.
The “easiest” solution I’ve seen suggested is to allow players to remove runes from leg armor for free. That way you still have to acquire the runes you want, but you can change them for free. I put easiest in quotes because I’m not sure how easy it would be for anet to implement this, and it also would create more inventory problems as now you would have to carry around extra rune sets with you if you wanted to be able to change them on the fly. Best case is you have a bank contract and just have to waste space in the bank instead of your inventory.