I don't know if blizzard would ever be open to the idea of a Ranged/Melee hybrid due to balancing issues but it seems like the survival spec would be great to change it to next expansion with harpoon and disengage already in out toolkit.
Here is how I think the spec could play. You would harpoon to get in melee and have a few abilities that you would fire of in melee (i.e. a few bleeds maybe stick an explosive to the mob that would leave a dot or have a delayed explosion) then you disengage out and have a few abilities you would fire off at range (i.e. an explosive shot, serpent sting). At some point your bleeds you applied melee would be wearing off so you would have to harpoon back in to reapply. Then its back to range to do more ranged stuff. Giving the spec a very active play style with a lot of mobility built into the kit.
That is the basic idea that there could be a ton to build off of. I personally think a playstyle like this could be very fun and active and the talents could be built around having a more melee heavy build or a more range heavy build. It also seems to fit the survival theme.