I have to agree that there are, from my perspective, a lot of KM log entries that are entirely unnecessary. There a number logs in which many entries are repeated within a second -- all dups. I have previously requested that these type of logs be stopped, but so far they continue.
The main thing is that there is not a need to review the KM Engine log unless you have, or suspect you have, some time of KM problem, or Macro Action failure. Particularly when you have a Macro failure that gives you a brief, incomplete Notification, you need more information, and the log is the place to go.
So, to deal with all of the noise in the log, to find only the needed log entries, I wrote this macro:
MACRO: Display Last KM Macro Error Ver 4 [Pub]
You can use it to get the details of your last error without ever viewing the KM log file.
Maybe this will be of some help for your needs.