Plus doesn’t the Staal line have the worst goal differential of any line on the team right now?
Not really. here's the 5v5
Martinook-Staal-Fast: -1
Bunting-KK-Necas: 0
Bunting-Aho-Jarvis: +3
Bunting-Drury-Noesen: -1
Lemieux-Drury-Noesen: +2
TT-Aho-Jarvis: +5
Svech-KK-Necas: -1
Svech-Aho-Jarvis: +2
TT-KK-Svech: -1
I would bet none of those are, other than +5 are that statistically different given the minutes together. On top of that, Martinook-Staal-Fast play against the toughest competition and with the least Ozone starts than any other line. They don't score, but they've only given up 7 goals against in 239 minutes of 5v5 play. I'm confident that any other line facing that level of competition for that many minutes would have a much worse goal differential.
Really putting those analytics to solid use.
Actually, given their quality of competition, ozone starts, Goals against, xGA/60, xG%, possession, etc... keeping them together is probably putting analytics to solid use. Splitting them up to get more scoring and hurt defensively/analytic metrics would be the antithesis of analytics.