When did this become *my* MMO?
Did I hit the jackpot and nobody told me? Sweet!
As for the three years of development - go soak your head. You clearly haven't a clue.
Yes, it like all flashpoints are doable later. If you outlevel it sufficiently you will no longer get experience, but you'll always get the loot and the enjoyment. At 50 you can even start doing it on hardmode.