Snowdonia offers so much photographic potential - but like all these grand vistas - it just needs the right light light to show it at its best.
The best light is bright sunshine and dark clouds - it gives both perspective and texture, pure sunshine (yes - v rare in Snowdonia) is OK for texture
IMO, you might want to think about the foreground - wire fencing can spoil an otherwise excellent shot of such magnificant wilderness - tussocks, bracken and heather are all great foregrounds for such a subject.