In what way did it not make sense ? Admittedly it was written during the time of LW 4, however the principles still all apply to LW 5.

As for removing Ultrapeers. You can try that maybe once every 15 minutes. Remove the longest connected one, then the next, etc. until search results pick up. Of course you will need to wait for LW to find another ultrapeer and connection settle down before searching for files again.