It seems that Bird right qualifications have not changed in the new CBA. Quoting from Larry Coon "When a player is traded, his new team inherits his Bird rights". Again quoting from the same source "The clock resets when the player changes teams by signing as a free agent" meaning that when the transfer occurs by way of trade the clock is not reset and the player's Bird right is preserved.
Having the aforementioned in mind, it is in Dwight's best interest not only to remain with the Magic for the rest of the season, but also does not opt out of the last year on his contract. Now if he still wishes to leave Orlando, the best scenario for him would be to be traded before the trade deadline of next season, whereby he maintains his Bird right when signing with his new team at the summer to follow.
This view totally changes the landscape on Dwight's prospective future, and rejects the viewpoint that the Magic have to trade him before March 15 deadline or risk losing him for nothing. Now the question would be: is enduring with the Magic for one more year worth the financial rewards? I submit to you that the answer is affirmative. Some may say Dwight would be willing to forfeit millions of dollars, but why? The extra year and additional annual salary increases which come for a Bird right player are significant, and no one should be that foolish to throw them away in a league which just one injury could put an end to a player's career.