I believe in limits, I'd just like to see them imposed in a more open way.. The more people you have, the higher the resource cost. The more territories you have, the more resource cost.. The larger the alliance, the more the cost..
Whatever limits are to be imposed, please do so in a logical way that doesn't hinder the immersion.
the problem is with more members you have a better chance of getting more resources. it'd have to be exponential cost as the guild level increases (assuming 5 or so levels with each level adding 50-ish spots).