They are close but everyone else is close. Some teams will improve, the Sabres have to be one of them.
The Sabres will have to play well above their current 0.476 pace. If they play the remaining 3/4ths of the season at .600 they will be in the thick of it and their full season points percentage improves to 0.570 which is 92 points, so even then they still could be short. Points in October/November are important.
So, they need a few winning streaks mixed in to overcome the poor first quarter, and they have to avoid losing 3 in a row at all costs. Every 5 game segment with 2 losses in it needs to include 3 wins to stay at .600 for that 5 game segment.
They need to minimize getting OTLs within their conference too. Win your conference games and you take points away from a competing team.
Bottom line is they are still alive but they do not have an easy path to get there.