You mean that stuff doesn't happen anymore? Damn. We had a guy in my class at AOCS (maybe more than one) that forgot to lock his wall locker, and everything got tossed. It was called a hurricane, and it left the room a mess, including the foot powder all over. It was a fairly frequent occurence at AOCS. The real test was to see how the roommates and the rest of the class reacted; whether they all pulled together to get the shit cleaned up, or instead made the guy feel even worse by dumping on him for forgetting to secure the lock. We had guys in my class (myself included) that got physically jacked up by the DIs; i.e. grabbed by the front of the shirt and thrown against the wall with your feet off the floor. I would be surprised if that still happened. Having a DI scream in someone's face was pretty much an hourly occurence, at least in the first half of the program (and AOCS was 15 weeks long, because all the API stuff was integrated into the program). Surely the DIs still get up close and personal with a loud voice, right?
Some of this still happens - getting hurricaned is a regular occurrence (my class went something like three straight weeks with a hurricane every day) and there is definitely the up close and personal time. Physically though they won't lay a hand on you to discipline you, they will just RPT you into the ground.
Things that we know have gone away: bringing sand or leaves into the pway, mattresses being stacked on the football field (apparently it rained when that happened once), getting PTed 10 minutes before/30 minutes following chow, and any RPT sessions longer than 10 mins in a given hour. I'm sure there are others I just can't remember them off the top of my head. I can personally attest to the SUYA hose still being used, although only when its above 60 degrees or something like that. I was assured by my DI before I left however that for every activity that is "retired" class team comes up with something new that works just as well.
There was definitely an emphasis this was a NAVY program, not a USMC one, and a lot of our classes and briefs reflected that. That being said, my SCPO was more than capable of dishing out discipline when the situation called for it so we didn't suffer from a lack of time with the green side - if anything we feared him more because we knew the only time he would put us on our face is when we REALLY deserved it, and those RPTs were the worst.
Personally I took a lot of value out of the interactions with the DI's, especially in Candio phase when you can actually speak to them and learn from them. I know their leadership styles won't translate directly into what I'm doing in my career, but it was helpful to hear how their experiences leading and being led by officers affected them. At the very least you learn a healthy respect for the USMC, and if you're lucky you get some mentorship on the relationship between junior officers and senior enlisted that supplements what your Class CPO provides. While it took a long time to earn those interactions, I wouldn't have wanted to go through OCS without the DI's.
