Too many replies overnight to get involved back into the nitty gritty of the conversation so i'll just summarise my thoughts on some of the common points:
The thing is, the new system isn't fit for purpose. It doesn't accurately reflect the ED community that's developed using 3rd party tools and these (and other) forums.
If this guild system had been in place from 1.0 then yes player groups would have developed silo'd with one guild per player, but by doing that the Devs would have tribalised the population. I'd be highly surprised if the fuel rats would have formed as most guilds wouldn't want to help other guilds. If anything an early guild system would have pushed us more and more towards EVE and mega guilds fighting PvP fights all over the place.
Thankfully the Devs waiting is a blessing as things developed more organically, people went exploring with strangers on mass trips. People started racing tournaments. People started refueling. None of that would have happened if people were locked into guilds with a handful of like minded people. Just like real life where people have work friends, school friends, hobby friends its healthy to belong to many groups with different interests.
I'm seeing about 2/3 pro and 1/3 against multi squadrons, the ones who are against it all seem to be in the same mindset that its us vs them. Diplomacy (which doesn't exist in game yet), spying, gankers, other people are the worst so i need to lock my friends into a group and conspire against everyone else because its not safe. Maybe its just me but I thought ED were trying to do something different from the classic 'mmo' guild vs guild PvP fest.