I dunno, I tried Grizzly Stiks a long time ago and they didn't fly at all like I expected. Admittedly, I didn't give them a chance...knew little about carbons, etc. But, a couple of years ago I tried Carbon expresses and more recently FMJs and both worked very well....but I was also more commited to figuring them out. Like you, I had years of real good results with compressed or tapered cedars and Zwickies or Magnuses. Why change? I don't know but I'm now pretty convinced the Ashby formula is a better way to go. Only have a couple of animals to judge it by, but - so far, so good. Am now trying ways to make my old beloved wood shafts have more of these characteristics.
In general, I like ABS and the things they choose to sell. Like the old Paul Brunner catalog, it is always an interesting and appealing read. The Grizzly Stik makes sense in a couple of ways, but I bit on it once and wonder why some folks had a better experience with them than I did.