Haven't posted in so long I kinda forget how to start a post. Oops.
I guess first, I agree with the left out thing, but I guess that's something to fix on more of an individual basis. It really depends on people's personalities and outgoingness. Some people have spent a long time making the friends they have and have more trouble being welcoming while others are very outgoing and welcoming. Overall, I think people don't talk as much as they used to in chat especially when just a few people are on. I think if people would try a little bit harder to ask how people's days are going it would help solve the problem.
As far as surrounding, Int is working out and from the pictures I've seen its beginning to look a lot better. (I haven't been as active as I should be so I haven't been to spawn recently. )
I also agree with the diversity fact, as do a lot of people, but no one ever seems to have many ideas. The reason people burn out is because everyone wants to become op and then when they are they lose interest and quit playing. Then when that handful of people quits playing, server activity drops and many people decline to get on when there are only 1-2 people online. But resets aren't an option because another handful of people are still dedicated to their bases so it wouldn't be fair to them. Honestly, I don't know if there is anything we can do to stop the cycle besides perhaps prolong it. And of course now with school, activity will drop anyways. I think during the school year, people like to do short bursts of minecraft and not devote themselves to projects as much.
Next, I must agree with the whole diamond thing. People seem to get so greedy sometimes and it would be a great community bonding thing if we just helped each other out for free for a change.
Don't know if this helps at all, just my opinion.