common problem for 95% of guilds in guild war have always been the fact that members opted in for guild war then dont do their attacks.
Each guild chosed their own strategy to face this problem, including kick members, opt out them or just give up for guild war and chose to dont be a competitive guild.
I have an idea to definitely solve this problem: what if leader and champions can attack using the defense lineups set by each members for offense?
Lineups must be used in the defense order, and this will count as an attempt by that member.
Also retry is not allowed and it is an auto-locked fight. Basically you take the lineup that a guild member previously set, chose a target, simulate the attack.
In this way the whole problem of players missing few battles is totally solved, but on the other side there is a disadvantage doing that, because you can properly chose the offensive lineup, cant retry and cant manual fight.
Edit: The whole thing can be also used like an option, that can be turned on and off in the guild defense homepage; if on, leader and champions can do this; if off they cant.