Thats because they have the choise to do so, and not something forced unto them.
Sorry if it sounds like i'm blaming all of this on you, as that is not my intention at all.
I like that there have been done things to improve on the costume,but what you(here i mean BSN and the legion as a whole) are doing here, is demand people more or less build to Lancer specs.
I'm not saying that its all bad, but mayby people should have the option to leave out some of the little things, like suede and a bit of elastic, in their build, and then have the option to make a choice of their own, to put this in later, when they want it to be there, and want to be more acurate, but i like that the vest now is required, as this is a rather large part of the costume, that helps on the overall look.
Right now i cant see any difference between the CRL and Lancer, which if nothing else, is a great shame to the Lancers, who wanted their costumes to be above the rank and file, but are now redduced to being just that.