I was pretty surprised by the customization options allowed period. I went to customize the H3 Spartan model to make him look like mine did back when I played in Halo 3 only to see that there is no option to customize individual armor options anymore. Pretty shitty, IMO.
The gimping of armor selecting for halo 3 and 4 is a little upsetting, but while the MP is in mixed hoppers I don't really care, it's not like I can dedicate my time to one game for BTB, you have to vote and be lucky.
Yeah, I saw that when I first went to customize my characters, and while it does suck, I'm not too upset by it because it IS mixed hoppers and I'm sure there are enough technical problems with the game that I won't be bitching for it to come back no matter how much I miss my customization options. =(((