There's a lot of talk on here about a switch/spey rod not being a proper pin rod. I beg to differ.
Around 4 years ago, I broke my only "pin" rod and used my admundson wind warrior 6wt spey as a backup. I never looked back. It loads up way nicer than any other pin rod I've ever personally used, and just feels better (snake guides and all). I even bought 2 blanks and got the handles built as "proper" pin rods. That being said, I still prefer to use the spey built rod as my pins, because I really like short handles. It's all personal opinion, but I very much dislike the standard pin build with huge long corks, and prefer a short 4 inch bottom, and 10 inches top maximum.
The same has held true recently with a switch to the rainshadow brand. The 6 wt spey I got built up as a pin is much lighter and easier to load up and aim than their actual "pin" blanks. Very, very similar action to the actual pin blank, but probably half the blank weight, and it's slightly more "noodly," which is what I prefer. In all likelihood, I'll probably never buy another pin rod again, and will stick with spey conversion builds.
P.S. I have actually found spey rods to help casting more than hinder it. With the proper timing, you can load the rod easier and cast in a shoe box. The higher flex also allows more of a slingshot effect = longer casting.