1. I like the idea but the only problem with this is that an extra staff member to pay for, so there has be one extra way of making money to make up for it. Perhaps team sponsors or something. I guess head coaches would affect the timing of Timeouts(ie. calling a timeout after an 8-0 run or calling a time one when your team gets a rebound with 10 second left.), how well tactics are implemented and mid game tactical adjustments. If this were ever to happen, it would be a HUGE change and I'd like it to be announced 2 seasons in advance.
2. I like having to option to have some kind of role like Go-to play, the player the team leans on; defense stopper, a player who will not shoot a lot and know he's only in for defense,etc,etc. It makes sense. But this also would be a huge change to game and would have to be announced in advance(like a season)
3. This is the one I think the game needs the most because I've seen two many times when there's a like 2 seconds left in the game and a player from on team misses a layup and all of a sudden the other team gets the rebound and somehow gets a three in the corner to win the game. I think this could be solved with a clock that goes to decimals(ie.9.9,9.8,9.7....1.2,1.1..0.1,0.,0.0) when time goes under a minute in the quarter. Also with no clock stoppages within a minute to go when someone shoots and misses.
Those are some pretty decent ideas there.
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