I don't know about that - it seems a bit 'rubber-suity' to me, i.e. here's the aliens who do X for no reason. On Earth Indians still are largely influenced by caste, but that doesn't seem to effect the gross designs of their ships - though it may have an effect on how their ships are run.
The modern Indian Navy grew from, and was originally patterned after, the Royal Navy... where most of its early personnel & all its early officers gained their initial Naval experience.
For the last half-century+, since being granted independence from the British Empire, the vast majority of their ships have been either UK/USSR/Russia-built, or locally-designed derivatives of UK/USSR/Russia-built designs.
Therefore, their Navy, its customs, and its ships, are distinctly European in nature, and do not reflect what an independent India would have developed over the last 2 centuries.
As for the Vegans, and your comment... "rubber-suit" is a term to describe making aliens that look different, but
act just like humans.
In this case, what was proposed was that the Vegans incorporate
their own culture into their ship designs, rather than copying Vilani or Solomani designs that don't reflect Vegan cultural norms!
Therefore, it is
Vegans acting like Vegans... which is the
opposite of "rubber-suity"!
They are NOT "aliens who do X for no reason", but "aliens who do X because that fits their described culture"!