Question is, will they be BiS?
A lot of ppl will say relic is for vanity and could care less about its stats when it is compared in 3.0 as a lot of weps via crafting / merchants etc will probably be stronger naturally. So they would have to dramatically increase the relic that is crossing over into 3.0 ilvl almost on par with the new raid wep which seems a bit much considering ur idea of the jump start relic being superior than fresh relics. I'm almost certain SE will find a way to cheese it and just skip all of this headache by starting fresh and giving ppl a cheap title that shows " hey world! I completed my relic post 3.0 "