Things haven't really been "thin" recently except for the playoffs (and even then, it's hard to single out a particular line to blame in that series).It's totally fair to bring this up. Arniel stuck with it thick and thin, and that patience is paying dividends. Lots of us were wrong on stocking with this line, me as much as anyone.
But since then, it's been all thick - no real pressure to mess with anything when the 3 other lines are good, you're getting Vezina goaltending, and the powerplay is clicking at 30%+ (it was actually nearly 45% in October when things were going really bad for CSV).
That gave CSV and the coaching staff a grace period to figure it out and develop some chemistry. And to their credit, they seem to have done that.