So I've been reading on stuff, and i'm very convinced that they WON'T be changing the current Valor Gears (489//496 for Shieldwall) to Justice Points because they don't want an 'instant catch-up' mechanic for people.
What i'm thinking is.. is it possible for them to create an item that are BoA (Binds on Account) that you can buy on your main character which has an Average iLvl requirement for you to buy, and then send it to your alt. Trade that 'token' along with Justice Points so that your alt can buy those gear.
With that, they can still keep the item under Valor Points for people aren't geared.. and another one that they can buy it with JP+BOA Token for people who have geared Mains.