Due to the lack of Clan War activity the top tier clans would eventually be unable to find a single clan war because of their ranking over others, forcing them to say remake the clan after every 5 wins just so they are able to find a match up.
However there's things that can be done in regards to clan war points which would affect the clans, such as;
New clans are limited to 5 players, to increase the limit you need X amount of points.
Clans need to keep up their activity or their clan war points slowly decrease, if they decrease below the X amount of points required for their total amount of players then they we receive a message upon login saying X players have been remove from their clan due to lack of points.
In order to keep your clan open you must generate atleast 70 points weekly, you are a clan afterall, clans are meant to fight not be a social hang out.