Maybe I've been too sold on the Kamui tip. Pool players are as subject to gimmickry and sales pitches as any other group. As long as the shark tip works & you're happy with it, stick with it. Maybe consider Kamui when you need a replacement?
The latest gimmickry in "low deflection" is a Predator Cue called a "Revo". Made in Tiawan, I believe. The Predator line was the first to come out with laminated "low deflection" shafts. Marketing hype or the real deal? Hell, I dunno...there are believers in both camps. Being old school, I stick with solid maple..
Anyway, the "Revo" has a shaft made of carbon fiber that supposedly was mixed with some special kind of pixie dust that only Predator knows about. Seems awfully $pendy to me when a production cue is priced like a well made custom. At $3,500 for a cue and one shaft? I'd more likely be taking to one of the respected custom cue makers.
Here's a sales pitch video:
https://www.youtube.com/watch?v=FTdflfh4GwU
Then pages of comments by players...some who actually have played with one. I haven't.
Predator Revo shaft full review and deflection test - AzBilliards.com
Your own deflection tests...did you try soft, medium, and hard hits? Again, it's really all about what feels good to you. Lots of emphasis on equipment while it's really more about player talent and experience. You'll find yourself improving over time. One of the pros said that any 12 year old could do what he does...all it takes is 30 years of experience.
For more about deflection than you really want to know....from "Dr. Dave"...a physics prof. in Colorado who uses pool as class material. He approaches the game from a scientific viewpoint.
http://billiards.colostate.edu/threads/cue.html#low_squirt