REALLY? I see you came to the same conclusion, as I think most of the guys that are running them have also?
The glazing, especially on a new call surface will glaze up quickly, so I just keep lightly sanding it with about a 100 grit sandpaper to rough it up a bit. They are like a new glass call that has to be conditioned a few times before they settle down and play good for the time your out in the woods. I've been also suggested to, to use that rain chalk, that is a lot tougher chalk that isn't effected by moisture quite as bad, it puts a better protection on the tongues and should help with the glazing problem? I know guys use it on pot calls that the striker skips bad on and it helps those play a lot better, so it should help the tongue calls also since we have to chalk those? When I purr on mine I always thumb the tongue, it give the call a deeper toned purr, like for a fighting purr. You can lay your thumb acrossed the tongue or just thumb the edge of it and it gives you two different tones of purrs. The biggest problem I've found with them is getting the tongues wet, they tend to want to warp, being thin unprotected wood. Sometimes the tongue wants to warp upward, then I just wrap a rubberband around the tip to keep it flat and let it dry out, if it wants to warp down then you can poke a small stick in the tip hole to keep it flat while it dries. So far all I do is carry mine in a zip-loc baggy, it keeps the chalk from rubbing off and keep the call dry. I still have a few things to learn about these call, but the more I use them the more I learn.
Glad the calls played good for you and you were happy with the sound of them. I was happy to hear they sounded very close to the original calls in tone. Walnut is a tough surface to run every call sequence on until it gets conditioned well enough, but the maples and purplehearts seen to be a lot easier and settle down faster.
Good luck in the woods with them amd post a gobbler pic when you get one.