Apparently 4K Media had done the subs themselves up until Episode 49 when they rolled out them onto Crunchyroll. However, starting with Episode 50, Crunchyroll's been doing the subtitles themselves. And yeah, a simulcast would definitely be awesome.
It depends. Obviously if all parties want to make it happen, I could maybe see 4K Media giving it a try. Whether it's in house or having FUNimation manage it. Though, this is all speculation, so I largely don't expect it, but would be a cool thing to happen.
By the way, Joshua over on Twitter mentioned he was emailed by someone at Nick that they'll air the rest of the episodes in May. While I don't expect them to really follow through with that (Nick quickly stopped the double premieres for Arc-V, hence why I'm hesitant on this), but we'll see. Also, I'm not sure what the guy meant by "the rest", unless he's talking the last part of "Season 1"....