Alright, so let's write out our opinion on the matter I guess.
I am of the opinion that guild points matter way more than summoning stones to a player. My thinking is based simply on a matter of consistency: while summoning stones are another source of fodder that occasionally will translate into a good pull, guild points always net you results. It might be fusion material for some and scrolls for others (imho a bad purchase but this is not the topic for that), but it will definetely translate into rainbowmons and Ifrit pieces for everyone. Both of these purchases will make growing players boost their progress immensely and stronger players get more tools for their end-game content faster. If there is a problem with the tradeoff of guild points for summoning stones, it is all on com2us' game designers giving its playerbase a reason to exploit the rewards system but none to actually play it out like they intended them to.
On top of that, just yesterday new items coming into the guild store were announced: guild buildings and legendary scroll fragments. While we are not certain on the pricing or functionality of these items yet, it is pretty safe to assume that the legendary scroll fragments will be something we all want to put our hands on. I think these announcements make for a wonderful, welcomed coincidence that we should not ignore.
So in short, I like the idea of gaining more guild points per week. I really really like it.