>>10367998Bin budget and final piece count. No reason to include a single 1x4 tile when the inventory already pulls from the 1x4 plate bin. Same reason it doesn't include the technic engine cowls, improved laser emitters, thickened profile, tiles for glowing engines, and extra greebling. Just those details add over two dozen pieces to the final count, without improving the end product it's trying to be. I didn't buy the polybag myself since none of the pieces are unique, but I saw a pile of them on clearance for 99c each and thought it was a decent design to try improving on.