No one has 'one or two guys that will consistently score'. Consistent scoring is a myth. That aside, the Devils aren't actually playing that great 5 on 5 so far this season (although tonight was pretty darn good).
Shootout ability is ridiculously transient. Overtime ability is ridiculously transient. These are things subject to enormous doses of chance.
They're going to get more goals. We know this. We know this because teams don't sustain this shooting percentage over a full season. Not expansion teams, not horrendous teams who might've been worse. So we know the scoring will improve. The trouble lately is that their best guys aren't getting enough shots - Ryder is a finisher and he's getting 1 shot a game. Henrique's shot rate is way down. You can go down the roster and mostly it's a lot of guys who just aren't getting enough pucks on net. If these guys can start to pick it up shots-wise, and the Devils can move from being a 52% outshooting team to 56-57% when Elias comes back, it can be a team that gets enough goals to win games, if they get the goaltending.
You had like 10 "if's" in there.