I'd say worgen for broken movement speed. The hunter damage I feel has toned down a lot since the past and their damage comes from time on target. Hunters should be on EFC from the second their flag is picked so I'd go worgen for those reasons. Personally D hunters are a FCs worst nightmare, especially one with an added sprint on top of posthaste.
Just my opinion though as a Horde FC. It's still quite hard to outrun a human or NE hunter but outrunning a worgen hunter can be a nightmare with open field / no los.
NE is smexy for the melding but it's kind of pointless in FR as hunters don't do well in closed territory such as 2nd floor / FR with possible LOS around. Either way you can bet your EFC will displacer out so you being melded and not being able to provide the burst to 1 shot it before displacer makes for the meld ambush kind of pointless.
Meld in mid isn't a bad idea for avoiding damage or CC, but with your range and the added disengage if necessary you should be able to range those big starsurges or polys anyways just my opinion. In mid, hunters aren't much of a priority so you probably won't see many focus ranged attacks that you can avoid from meld. If you were a boomie for example you'd be a high priority target in which case melding a ranged assault can be huge. As hunter I personally feel as though you can range the assaults regardless and your damage is lower than boomie so you should stay off of the map for the most part.
Just my 2c