It's clear the lengthening of the gap between wars is for the sole benefit of the upper ranked guilds. The only reason majority support appears to be for wars to be more spaced apart is because most of the forum regulars are in TOP10 guilds. The guilds that feel the pressure to retain their positions obviously would want more time between wars so they can recover without missing out on a war.
Now if you would ask a guild that is under no pressure to perform well (that is the majority of all of the guilds), I'd say they'd like to see wars more often simply because participation for them is truly optional and 'losing' will not result in loss of ego or shrinkage of e-peen. And they would love the extra indestructibles.
I'd love to see a 24 hour duration guild war every day of the week for the very same reason you'd like to see a guild war every weekend. There will be an enormous amount of b1tching and moaning from TOP10. If they are pushed to the limit, it would be exciting to see some new faces in the TOP10. Makes the game exciting for everyone.