Yup, I have..
My main reason was because my wife and I (and our 2 kids) share a quiver and the new .5 increments made it easier for us to be on the water at the same time .. I basically have a 2.5, 3.5, and 4.5 and she has a 3, 4, and 5.. and my 6 year old son has his name on the 2m (!)
Tbh my initial thoughts were that the new ones weren't much different but theres a subtleness to the improvements that have snuck up on me.. The silence of the flutter-free canopy / leech, the slightly improved bottom end, and the increased flagging stability to name a few. The wingspan of the 5m seems slightly narrower than V1 too but I haven't measured it. Amazing wings and the handles have been refined as well ..
The best thing for me though has been that the 3.5 and 4.5 sizes suit my needs perfectly 80% of the time.. (68kg, 36L Autopilot, 899 / 1099 ART foils)
My wife on 5m / 4'10 Ap / 880 in 12 knots

My son on 2m on JP SUP with Slingshot SUPwinder in 12 knots ..