I upgraded to 5.7 and my CPU that used to top out at 7% now idles around 27%. Why the big jump? The box only runs my User Manager and one small hotspot.
Is anyone else having this problem?

Do you have problems with idle or specific service?
Post your router load screenshot and remember 27% CPU load means, only that CPU works.

Where is said "Router load" screen. Is it new to 5.7?

Thanks,

Isaac