IMO, there are 4 reasons for the meeting.
1.) O'Connor was unhappy with one of Utah's coaching moves and wanted to 'discuss' it with the coaches
2.) O'Connor sees a major flaw in one of Utah's rotation players and wanted to get the coaches insights on whether or not to look to trade that player as soon as possible
3.) O'Connor was contacted by a GM about a potential trade before/during the game and wanted to discuss it with the coaches
4.) O'Connor fired/asked Jerry to step down as head coach
Option #1: Was O'Connor so angry/fed-up over something that he had to speak with the coaches immediately after the game? Could he not wait until tomorrow to speak with the coaches about the changes he wants to see?
Option #2: Kirilenko once again not only took the lowest percentage shots he can take (long 2-pointers), several times he would deviate from Utah's set offense. Just taking 1-2 probing dribbles throws off the timing and too often he likes to experiment to see what's there. Inexcusable for a player w/his experience. If there was a player I'd look to ship out immediately - it would be AK. Get Miles into the SL where he belongs and Hayward more time in the rotation.
Option #3: Again, what's the rush? If the trade deadline were tonight or tomorrow I'd understand, but most GM's like to wait to make a major move until after all-star break, when alot of the real talk gets done.
Opiton #4:Considering the conservative nature and emphasis on stability of the entire franchise for the past 20+ seasons, I can't imagine this being the case.
Thursday's cancelled practice throws another wrench into things. Maybe they cancelled practice to let Deron's wrist heal, or maybe they cancelled it because they don't want a guy practicing with the team who isn't part of their immediate plans, or maybe they cancelled practice so the coaches can meet and make some substantial changes to their offensive systems and defensive strategies - but for a franchise whose actions are pretty easy to predict, this is very strange. If I was a betting man, I'd take option #1, followed by #2. Just my $0.02