You see we have a completely different perspective. If your checking line can produce results like the did in early 21-22 where Lowry was giving up less that 1.5 goals per 60, and scoring at the same rate, and doing so against top lines at least half the time, then that should reverberate to your scoring lines taking advantage of weaker matchups (2nd and 3rd pairing d-men for instance), like the Oilers series where the top 2 lines won it for us, while Lowry outscored Mc David narrowly.
It's a proven working strategem, but if your top lines can't capitalize on those weaker matchups, with more o-zone time, then the fault lies with them. But that's not how it gets broken down.
To call Lowry's line weak is disingenous. The guy consistently works the puck from the defensive end to the offensive end. I mean you could make a highlight reel for every single player on this team to watch, and learn from, on how to play defensive zone hockey, by watching Adam Lowry. When you get weaker wingers, AHL calibre, well that affects the effectiveness, especially when you had a guy like Poganski for 10 games chasing pucks instead of retrieving them. Then came an inexperienced Reichel who didn't make as many plays as you'd like from that spot. Include Vesalainen and Svetchnikov, who wasn't so great in the defensive end, but pretty good starting 30 feet from the goalie. Get back to the formula that works, a solid forecheck (Tanev type), a guy who can retrieve pucks in neutral zone back pressure (Copp, Appleton), and Lowry winning more than his fair share of 50/50 pucks, and you have the makings of a good checking line. You can win with good checking lines in the NHL, this 3 scoring line jargon that everyone is spouting is only good if you have a good defensive centre, who is good on defensive zone draws. Lowry has never had Phil Kessel types, or Killorn, or Versteegs on his wing. Copp finally broke through but mostly because he played with more skilled players, like Stats and Ehlers. And he got PP time, which if you gave to Lowry, might result in a 35-40 player in a strong year. Just look at the output the guy had for Team Canada, with no hacks, and tell me he is the problem with this team. I refuse to believe that logic, based on everything I see.