Sozin's Comet, Part 1: The Phoenix King

Yes, Zuko should have told the others about his father's plan because even if they were still planning on their attack being before the Comet that information would change how urgent it was and probably make them less likely to goof off and watch a play (like they did the previous episode) and it is a fault of Zuko that he didn't say that.

Likewise, when did they reschedule their plan? Since in The Western Air Temple, Sokka says "the new plan is the old plan. You just have to master all four elements before the comet arrives" and Team Avatar didn't get a second chance for discussion until after Zuko joined which means that he was already in their group when they changed their plan and as such should have been told.

Aang comes across particularly badly when he says he can't kill "anyone I don't like" since if he can't tell the difference between killing an unrepentant genocidal dictator intent on global domination and killing "anyone I don't like" then he doesn't understand basic moral distinctions.

Also, Azula speaks out of turn in a war meeting during Zuko's flashback (as Zuko once did)and Ozai doesn't punish her or even express the slightest frustration at her for it. (Sorry, Azula apologists. Ozai wasn't abusive to her. He was to Zuko yes but not to Azula.)

Also, as a villain whose narrative function is to be more than simply a backstory for Zuko, Ozai is actually quite underwhelming.

Were there things I liked about the episode. Yes. In fact, there are enough good things about it for me to consider this episode good but with a very small g.