The "Befriend" Player Button
I think it would be a nice idea to be able to friend people in-game, like clan mates or other people from global chat or other clans. It would be like a Accept/Decline Request. With this, you can click a small button on the screen that allows you to see befriended players. Then, you can chat with them, look at their clans, visit their place, or maybe even donate troops*? But anyways, this saves the hassle of searching through masses of clans.
There is also a button for "Deny All", "Accept All" Or "Disable Friend Requests". You can also block certain players that may spam you, or do other bad things.
AND YES, BEFRIEND IS A WORD, IF YOU THOUGHT IT WAS A TYPO :{D <Accidental Mustache Man.
*I don't know if donating troops would be a good idea.