It's not the whole Control Panel. I also had issues with a significant slowdown, the beachball, and crashes. Turned out to be the new font previews on the Control Panel, not the whole Control Panel (which I use religiously). Go to your Preferences, go to Type, turn off "Enable in-menu font preview" and the 3 below it. That fixed it for me. Hopefully Adobe will fix this glitch with a patch of some sort.
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