The top lanyard looks pretty good. You will get all sorts of opinions on the lengths of the drops for the calls. Some guys like them shorter, others like them longer. It's best to figure out who the lanyard will be going to before you make it, and then tailor the drop lengths to their liking. For me, I'm a fairly tall guy, so I like longer drops. With that said, the lanyards in the 2nd pic and last pic look like they have pretty short drops on them. I don't want to have to pull on the lanyard when I bring the call up to my lips. I just want to lift the call to my lips.
I like your carriers as well. I make something similar with D-rings. I like this style a lot better than the over the shoulder carriers, especially for coyotes that have fleas or other nasties on them.
Brian