At the moment you have some labels who are leading the scene:
System
Innamind
Deep Medi
Lioncharge
Then you have other dubstep labels and sorts:
Version
Artikal
Tempa
Subaltern
Whodemsound (and all J.Robinson’s Labels)
Crucial Recordings
Chestplate
Uprise Audio
Tuba Records
New Moon Recordings
Moonshine Recordings
Nebula Music
Deep Heads
And labels that every once in a while release dubstep:
Pengsound
Hotline
Zam Zam
Soundman Chronicles
Scrub a Dub
Re:st
Release-wise I think the scene is quite healthy and people are buying records (any question rearding who is playing all of this records belong to this thread: Whos buying out the 1k+ press dubstep records?) - That said though, nights are getting more consistent for dubstep (at least in London) but yes, it’s rare to find a night where dubstep is played all night. Not complaining but maybe promoters are scared that if they make an “all dubstep night” just a few heads will show up.
There’s not a scene as it was ages ago were you go to one place to listen to a sound that you won’t hear anywhere else, I think that to have that in 2015 would be quite rare, but that doesn’t mean the sound is dead or anything similar.
Yes, it’s this boring conversation of "a lot of the founders of this sound left for Techno or 130 or this and that - I don’t care, there’s a lot of other guys who are still pushing the sound and writing these amazing forward thinking dubstep tracks.
So I guess the sound will keep developing within itself and I think that doubting of it’s potential would be to underestimate it.