No, it doesn’t. It contains a Support Weapon and it’s just the flamethrower, but green.
You’re not missing out on anything other than the gas grenades and skins.
And the grenades can’t open loot containers or close bug holes/fabricators. They are tiny versions of the Gas Strike orbital, but without the explotion.
It’s good if you want something more ‘close to the books’ story wise.
However, the Harkonnens are quite dialed back (they always are). And everything is low budget.
But personally, I enjoyed it and still re-watch it from time to time.