It would have been a little naive to think that 1.3 and all that came with it was all HG was working on.
With the enormity of the ARG it would make sense if 1.3 was only the tip of the iceberg for what they’ve got planned.
1.3 was the update that sets the scene for the future.
This is perhaps the next step. @Polyphemus post ties in with this quite nicely. Potential Spoilers