First Bug report regarding the new preset management:
You can choose any effect from the preset list in Rig Manager and it will load up just fine. However, once you lock it into place, you cannot change the preset anymore. Try locking in a Natural Reverb, lock it and try to pick a Cirrus Reverb preset (or a whole different effect preset for that matter). It will not load up and stay on the Natural Reverb preset as long as this effect is locked. You also cannot load up any different kind of effect, it will just be disregarded without notice until you unlock that effect and try again. Furthermore, the same is true for the preset list on the very top (the factory baked in ones). No parameters will change as long as the effect is locked.
The only thing that will effectively change the effect is if you select a different effect and either choose "Load Type" or "Load Default".
This is the very first thing I noticed, as I always use the lock function on my Kemper. Please note that I only tried this with Rig Manager and not the unit itself. It may behave differently.
By the way, I also couldn't download the PDF attached to the Announcement post because it said "not authorized" for some reason.
I have yet to play with the new fuzz effect. Anyways, I'm really liking what I read in the changelog and I appreciate all efforts by our beloved Kemper team to improve the Profiler and specifically RM