You forgot to mention how to deal with those who say, "I don't need the mats. I was just here to help out." Also, if I bring Widget to a boss fight, are we 1 guild or 2? (She is not a Rift Walker; she is an Expendable Asset.) If we keep it manual, then we side-step those issues. Those that just helped for fun instead of profit won't get stuff they don't want, and those with alts won't double-dip.
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Do not assume that you speak for all just because you are the loudest voice; there are many who disagree that simply have no desire to waste words on you.