Half wars are basically no different from normal clan wars, except they have a 12- hour prep/battle AND each person is only allowed to attack once. (This is just an additional option for clan wars. You can still choose to play the normal version.)
Why?
1) It will put a stop to those bunnies. Sacrificing 3 stars for just a chance to 3 star another base is definitely not worth it. Starting a half war will make your clan safe from versing a bunny clan.
2) Ever seen a clan get full stars while the half the people don't attack at all? This will prevent that. Every single person's participation is needed in order to succeed.
3) Expanding on #2: At certain townhall levels, troops are overpowered. At TH7, it is nearly impossible to defend against all dragons, and at TH 9-10 GoWiPe. Even if you do miraculously defend, there will always be enough cleanup available for people to beat you with second attacks in the normal wars. Here, you must be very careful, as mistakes can't be amended.



