It would be nice to be able to start clan wars at about the same time of day consistently, instead of gradually getting the time pushed back by the delay in starting a new war (matchmaking process and such), as well as random maintenance breaks that throw the schedule off by pausing the war timer for a couple hours. (Our clan has had to deal with this by waiting overnight to start a new war when the wars get to the point that they are starting after most clan members are in bed-- which is not ideal because we mostly play the game to war, so we lose a day out of every couple weeks or so.)
I would propose to fix this by simply cutting down the prep day for wars to 23 hours. This would give enough of a buffer so that clans would generally be able to start wars every 2 days at very close to the same time. And really, nobody needs the full 24 hours to prep, do they?