Strome is listed as the 56th best center (for points so far this season) in the league on NHL.com, while that site has a ton of wingers (like Panarin) listed at C for some reason. So not a 3C.
DeBrincat is, for some reason, listed as a RW on NHL.com, but for RWs, he's currently 12th in the league. So also not a 2nd line wing.
Seriously, how the hell do you think a guy who hit 40 goals last season is anything other than a top line wing?!? Yeah, he probably won't hit that threshold this season, but there were only 13 players who hit that mark last season (that includes centers and wingers). Hell, only 45 guys last year even hit 30 goals, which if there are 31 top line centers in the league and 62 to line wingers in the league, it means that out of 93 top line players, less than half could even hit that mark last season.
Panarin is better than either of Strome or Cat. But he's not better than both of them. Hell, Cat's production last season was on par with Bread's when he was here (scoring was higher last year, but Cat was also several years younger than Bread was at the time).