Nightfalls, at least the version you get via guided games, can easily be matchmade at this point. You get a pretty basic experience without custom modifiers, but at least you get to play it. As for raids: Even though I have yet to complete any D2 raids, I'm still not a fan of raid matchmaking. I'm picturing people dropping out halfway through or leaving because the encounter is taking too long, like I've seen in D1 raids and the few times I attempted using LFG for D2 raids