Clan war chat (talk to enemy clan) no brainer.
Think of all the abuse, the bullying. Probably loads of people would be hurt and annoyed, some would even contemplate suicide if they do a bad attack and the enemy clan insults them. The game isn't for insulting, and this is all this would do.
Clan war wins AND LOSSES (duhh)
This would ruin some clan's reputations. There is a website for this if you really want to check
Clan tournaments (obviously)
Not yet, they are still experimenting with it and it is too complicated to implement just yet.
Heros in war (does anyone one person in the world outside of supercell not want this?
http://forum.supercell.net/showthrea...-Heroes-in-War
More time or more troops (way too many 96%+ and cosider 99% and50% both equal 2 stars? Th10s+ defense is too good/hard
You get 3 minutes and 30 seconds in the next update. Should solve your problem!