Imo plus minus needs to be combined with points scored to see the actual impact a player has for their club. MacT is a plus 4. His club is ahead when he’s on the ice. He’s clearly a keeper. Of their three top centres Zegras is imo the guy they will move.
Okay hold on, you're telling me that the most iffy stat in hockey, plus points, is more indicative of impact on winning than ... actual wins and losses?
That's like saying after losing game 7, oh no actually we won that series since we had a positive goal differential.
Besides which, +/- plus points essentially double counts ES points, gives a bonus for PP usage (McT having had the benefit of PP1), and gives a player a pass on bad penalties that resulted in PP goals against or wiping out PP opportunities.
But fine let's play along. Since we only have 2 games this year plus the last 11 from last year where Zegras played C, here are his numbers:
13 GP 2G 7A +4
So by your "calculation" Zegras is actually +13 in his last 13 games at center and is blowing McTavish away.