Right. So I know Haste is the bottom of the totem pole as far as our stats go, for Arms OR for Fury, but this Raid Finder trinket still has a decent chunk of Strength on it on top of the haste proc (and while haste isn't nearly as valuable as crit or even mastery, it's not ENTIRELY useless). I don't have a lot of options to choose from right now. I'll post my armory, but don't criticize my lack of enchants/gems/reforging/tinkers/etc..., I just acquired a large handful of upgrades in a relatively small timeframe and just haven't gotten around to it yet (I'll probably do so before bringing my butt back into LFR later this evening).
If the Vortex + Coaster are my best choices at the moment, I wouldn't stress too much over the hit/expertise from the Dragonling - I can always replace the haste/mastery cogs in my helm (for now, at least).
So is it worth using until I find something better, or should I just vendor it?