It's good to have additionnal savage content but I have majors problem with DRS.

48 players is too much
It's extremely difficult to get 48 people in DRS, in my opinion it should have been reduced to 24, much easier to assemble 3 groups.
Communication also tends to be a challenge and ends up with 2-3 leader talking and the rest muted.

The difficulty is laughable
You will reach enrage 90% of the time on a first run and mechanics are very easy despite being punishing (3/2 strikes and you're out), each fight is minus Extreme difficulty with a DPS check. If you do your homework, you can join a clear group and even make a deathless/debuffless run on your second run. Also, there is no mechanics that can wipe the whole group, it's either everyone made a mistake or enrage.
But it doesn't stops you from getting a DRS clear and laying on the ground the whole run. I've seen people getting to the end, dying at the beginning of every fight.
The real difficulty is to get 48 players in and how chronophage DRS is, 2 full runs can ask 2-3 hours.
Also slime/golem sides are way too different difficulty wise, both sides should've been around the same level.

There's enough ways to get raised and avoiding K.O. is very easy, a mistake can always happen.

Overrall, it's not bad but it has major flaws and since it's so long, it's also difficult to get people motivated for a run or two.
And I fear for this kind of content in the future, it's already hard to find people for BLU, it'll be harder for people to get DRS clears.
My guess is that we'll see other ways to augment the armors and that the next iteration will bring massives buffs in DRS that will allow faster, easier clears.