I’ve been discussing this with some player from some guild too. I’m in favor with this idea too.
When the guild chests first were proposed at 45k that assumed all 30 members in the guild would have to contribute max seals to get the chest. This was changed to 40k which then allowed guilds to max their guild chests even when not all 30 members could max their seals. This same idea should be applied to GWs. Not everyone in a guild wants/able to participate, others may have RL circumstances like vacation that would preclude a member from participating, or a guild is shorthanded which results in a guilld being at a disadvantage in GWs. Changing the number of participants to maybe 25 would allow for the above circumstances and also give guild members a break from GWs if they need it.