If you get more plastic, you need to sell it with larger prices, thats how it goes. I dont like larger prices, but I get why there are there and that they are not just slapped on just cause someone is greedy, there are valid reasons behind it, even though a cheaper alternative chould have been made. We as consumers dont really know how expensive it is to make larger plastics as oppose to the smaller ones. Not to mention the complex plastics as oppose to the simpler ones. Not to mention newer plastics that have only started their production and may not be used that much in other lines.
He also didnt have the same coverage as the Death Trooper, as well as he didnt have longer leg pieces, nor the larger shell pieces for both of the parts of his arms, and the upper part of the legs.His gun also uses much less and simpler parts for its construction. He also doesnt have the plastic sholder paldrons with added system constructed packs.
Death trooper also has two-three exclusive prints...but printing in general is not much of a good comparison since a lot of the sets have similar to near similar amount of printed pieces (or stickers for some).
And yet he has a simple build with far less armor, addons, coverage, simplistic weapons, and smaller bone pieces.
Jyn Erso is the only set that has gear functions in this wave, not to mention a large amount of weapons, and a compact and covered build. K2SO is seems larger because he use very small and very skinny parts to create the very large very spindly build. He makes it look like he is worth more, despite using the same amount of plastic as the others weight wise, just divided in way smaller parts. OT Storm Trooper having a near similar build as the Death trooper is a given, since both in the movies have also very similar builds, so having this issue is pointless since the problem originates from something LEGO didnt make. This isnt a Bohrok-Kal levels of repetition since the each buld gives something different, if it be the helmet or head, the different color scheme, the different weapon build, the different bone pieces...