I think Martin loves Tay and Judge. I think both have been legitimately sick and Tay legitimately hurt. While sick/hurt, they probably haven't been able to practice at the level he expects. He's not mad at them, but he's not going to play guys that haven't practiced at a high level or prepared or specific opponents. I believe Frank probably thinks Sprads is a slightly better pg at this point.
You only have time to practice certain things. Frank's main focus is half court man, rotations, rebounding, etc. Then probably half court offense and transition. Then inbounds, etc. Then zone defense, full court pressure. Just guesses, but for the way we play, probably something like that. Our full court pressure is mainly token stuff, change of pace, to mess with opponent's tempo, rhythm, etc. We'll throw it out for real only when we really need it. Same with our zone, mainly in the last 5 minutes of a half or game and mainly a change of pace.