I think the bigger concern might be that they don't really get enough close-game reps because they're blowing everybody out. Remember when they went on that huge second-half run in 2022? They were destroying teams but it was hiding the fact that they weren't actually a good halfcourt offensive team and needed create TOs (and make threes) to make up the difference. When they ran into really disciplined teams that didn't give them easy points or their 3 ball was cold, they didn't know what to do.
I think they're an older and more offensively diverse team now so it shouldn't be an issue, but I would still like to see more close game possessions to inspire confidence going into the playoffs. What is their decision-making like when they are in a must-score situation and the 3 isn't falling? Can Tatum post-up consistently? Will Jaylen reduce his wild drives? Will Brown or Tatum really give up the ball if that's what is called for? How will Porzingis react when he's getting pushed around 24/7 by physical postseason play?
I kind of get what you are suggesting but that 2021-22 team that was blowing people out in the second half of the season made it to the finals. They did just fine in close playoff games even after Rob Williams was hurt. It turned out that they didn't have the experience to hold up to the pressure of the finals, and GSW did, but I am not sure a close game on a Tuesday in February was going to help with that.
This time around, other than Porzingis, the core of our team is late playoff tested and in many cases, finals tested. I think what we are seeing is that experience manifesting itself in the realization that you need to keep up that intensity every game, every quarter. And as to Porzingis, I think he is going to be fine in the playoffs or big games in general. He doesn't have to be "the guy". I feel he appreciates this opportunity and "gets it".
I think it is more important to see the team continue to play with intensity vs. having them play in close games. If playing at their best means blowing out teams, that is still better than playing sloppy and having to pull out close game. And there will be close games where the other team just shoots lights out or whatever.