My perspective is that defensively we have been pretty shitty most of the year, and in my opinion, defense matters most in the playoffs. James is off, JR is off, Love is off. So for the season, we have sucked balls defensively. From that perspective I think we need more defense than offense. We can score a shit ton of points, but against either GS or Houston, well they can score as much as we can. We need to be able to get stops when we need them.
This year Tristan is a -9 net (82 Games) and giving up 23.2 defensively, while Z jr is -7 net and giving up 22. Neither of these defensive numbers are particularly good. (and Love is no better). Last year Tristan was giving up 19.9, and the year before that Tristan was giving up 17.9 as a center.
So while Nance Jr and Zizic are both scoring better, I think the team would be better if Tristan can be 17.9 Tristan rather than 23.2 Tristan. We aren't going to need that for 30 minutes, but we need it for 15 minutes. That said, the fact that none of our centers are playing defense for shit MAY be a reflection on the defensive schema, so there is that.
I have nothing against playing Zizic. Just saying I understand if the staff is trying to gage what Tristan might have left in the tank.