I have a feeling I experience 'roughness' of rides differently to most people. There are often comments about SAW being rough... and now Rage too. Having been on both several times and also Speed at Oakwood, I had never considered any of the Eurofighters rough or uncomfortable at all.
Corkscrew was fairly rough towards the end of its life... and Black Hole gave a fair few jolts too (especially the brake section at the end). I also find the first banked turn on Rita a bit rough, while Stealth by comparison is fine.
Similarly if a ride is too smooth I find I enjoy it less. Air was a unique experience when I went on it the first time, but every subsequent time it feels too smooth and tame.
Linking this into the construction, The cobra and batwing are actually both fairly wide arcs compared to most other elements of this type on other coasters, so I think these will be pretty smooth, and perhaps the larger trains with probably fairly decent suspension (Which Gerst have apparently improved recently on newer trains) will handle them well. I think the Sea serpent/dives will also be fairly large. The only tight looking turns on this ride seem to be lower velocity heartlines etc, so I think roughness might be minimised.
Even if it does turn out to be rough though, I reckon people should man up and enjoy the ride love.