Here I am, all happy as a pig in ...... when shooting the half dozen Easton Excels I bought about three weeks ago. I am getting great groups out of them and have found them to hold up relatively well for me so far in terms of retaining their straightness levels....after shooting them 3 to 4 times a week since I bought them.
Then I go ahead and read your post MM.

Now I know I am going to be second guessing myself as I pull one out of the stand to shoot.
Maybe I got a "good" half dozen.
I have to admit though that they are shooting more accurately for me than either the Beman ICS or the Axis out of one of my bows with my particular setup. As the others have made mention to maybe it isn't the construction of the shaft but possibly a spine match issue with your bow.