I'm not saying the randomisation would be a boatload of work, though it's certainly more than just throwing a few lines of code in and calling it a day -- it's worth noting that xcom is gridbased and D:OS is not, which complicates things, even if making a random number generator is simple. Every fight would need its own randomization factors.
I'm more saying doing a NG+ mode that is actually fun and interesting and even remotely balanced (fun and balanced are quite intertwined when it comes to challenge, which presumably a NG+ would emphasize) would involve lots of testing and tweaking and scaling formulas and possibly new skills. Throwing in a mode for the heck of it is pointless -- it makes the game seem unpolished, even if it's some optional "fun mode." If it's half-assed, it's a waste of their time and money. They already have a ton of things on their plate.
But to play along, giving enemies random buffs could be kind of neat, like Diablo 2 champions that have random stats. Like, you could run into a "Flaming Skeleton" that leaves a burning trail where it walks, or a Vampiric skeleton that leeches damage, etc, perhaps with some enemies having multiple random buffs. That might fit better in some kind of endless arena than the general game though. In general, a randomised arena with randomized obstacles, enemies and enemy buffs would be a lot of fun without being overly ambitious.
Last edited by Baardvark; 15/01/17 10:55 PM.