That's false.
They told you exactly what kind of content was coming, and they're following that.
A roadmap gives you an indication of what the "route" is. The timings are just rough estimates in this case.
Storms Brewing was intended to bring weather survival back with storms and it is exactly what they released.
Next there's "A new Threat" which will bring bandits, and they're working to release them next (along with the sandbox update).
So, the roadmap is still being followed. If anything, they're adding even more content in the mix while developing the roadmap stuff.
(side note: check you English please, your wording doesn't make it easy to understand what you mean)