I would like to see the upper level fortifications require special tools to breach. In my experience, this method helps in community building as people get to know who is who based on their progress on the server. Alliances form to take down large groups. These large groups become rivals, sometimes even friendly rivals, and it becomes pretty clear who is capable of pulling off large base raids. These are the people that I enjoy having on our server and are the people that help with its longevity, staving off the need for server wipes a little longer. They are also the people that will rejoin your server after a wipe, helping to start a baseline population.
The ability to start destroying established bases within minutes of joining a server will be harmful to community building within a server. That’s fine if Rust players want to constantly migrate from server to server trying to establish a home/forming server raiding parties. Personally, the server migration and monthly/weekly server wipes are two of the things I like the least about Rust. I don’t see this particular change from legacy helping in any way to alleviate that.
Warning: Story ahead
Just as an example, we hosted a west coast server as many of our members live there. We ended up attracting a large Korean population at night on our server. We’d do our stuff during the day, then go to sleep and wake up the next morning to find a series of pillar ladders/crate jumps, etc around our base as they attempted to raid it. As days went by, new bases would appear overnight and after a few days the C4 raiding began. We’d raid their bases during the day and spread the loot around a few bases/hiding spots. We’d get on the next day to find that some of our bases had been raided, so we’d patch up the holes and raid a base or two of theirs. Even though our playing time barely overlapped, we still knew where things stood on the server.
That’s not to say surprises didn’t happen. One time one of our loosely affiliated allies found a pair of their stash houses and got away with a few dozen C4 and tons of kevlar and guns. We had just been hit pretty hard, so we waited until 3am pacific for all of them to have logged off and proceeded to raid a few of our allies stash houses that we knew about because we knew they’d have newly acquired loot in them. Yeah, it was kind of a dick thing to do, but they started off as our enemy before joining sides in response to the nightly raids and the server’s changing dynamic. Of course we played ignorant and the blame was placed on our nighttime friends.
The point is that the necessity to progress to the point of needing to craft C4 invited people that we rarely interacted with to become part of our community.