I've watched for the past 6 months as up and struggling guilds have lost very good players to Ruin because they just felt there was no other way they'd get raid end loot - to the point where Ruin was overfull on raids, up to 44 online at a time, and turning away bots/alts/players. Note: this is not Ruin-hate. Just an observation. I've seen the same thing to a lesser extent occur with what used to be the guild formerly known as Escutcheon.
Now, if players want to see high end loot, they might have to go back and actually help pull up those same guilds they left earlier. For the first time, Ruin is on the butt shaft end of the same stick they were playing with for the last 6 months.
While I can sympathize with the loss of friends from a guild, I can also say that I strongly sympathize with the up and coming guilds that really have very little chance of getting anywhere with the 36 man raid setup as it was. When I see both sides of the picture, I feel I have to choose the 18 man raid forces, in large part because I just feel it's what's best for the majority of the population, but also because I feel it's best for guilds overall.
As an aside:
What I really hope to see out of all this is not only more guilds competing at the high end, but also less bitterness and rudeness in that competition. Hopefully, if your friends end up having to move to other guilds, you will still remain friends! Maybe, if you have room for them, you'll invite them along anyways, even if they're not in your guild! It just might be the case that people that are left out of some raids could organize pickup raids: this is a LOT more feasible now.