Draco meteor is far from a bad move.
It's DPS is comparable to outrage because of how long the cooldown is for outrage (there are also a few cases where DM actually beats the DPS of outrage, though rare) so having a draco meteor one is hardly bad. I have a 96% DM one from the first time it came out, she's still hitting raid bosses almost as hard as my 100% DT/Or one.
If your in need of another dragon, i'd say evolve it, if you have a lot of dragons as is, i'd wait and see if it gets something else in the future. Personally I dont think thats likely, but it is a (small) possibility some of its other legacy moves might come back.