On the 3 point shooting issue, I think it is a combination of a lot of factors. Shot selection, personnel decisions, kids staying within their well established skill set relating to shooting, and perhaps other issues. You can "run and gun" without giving every player on the team an equal right to shoot any shot they want to shoot regardless of their shooting percentage on that shot. The fact that a player can hit a 3, doesn't mean she should be shooting them if her game shooting percentage from the 3 point line is poor. No time left and they have the ball, sure, fire it up as an alternative to a turnover due to shot clock violation. Some girls can shoot an adequate percentage when squared up from the 3 point line, but have a terrible percentage on 3s when on the move. Some are good from the line, but not from even a few feet further out. A coach has an entire off season to gain an understanding of what each players skill set is related to shooting and then, until and unless they plainly demonstrate improvement, limit them to shots they have proven to make a good percentage of. Giving everyone the right to play like they are at the YMCA and use games that count to work on their shooting will cost you against good teams.
Most NBA teams use what I think they call the Boston Celtic drill when evaluating their players and potential players. 100 shots from the different points around the 3 point line in rapid succession, all in a catch and shoot format. Then, they just total up the makes. Your not being guarded, and so if you can't hit a certain number (I think 80 or more if I remember right), you aren't a 3 point shooter under normal game conditions. If you do the drill enough to prove being able to hit the 3 from a given spot, then you only are allowed to shoot the 3 from that spot. If you want greater freedom to expand your right to shoot, you earn it in the drill in practice and not in the game.
Heard Billy Tubbs discuss this issue many times. Get your players to buy in to being really good at doing what they do really well. Work tirelessly on the shots you are going to be shooting in the games. Waymon used to spend his entire pregame warmup shooting a gillion little turnarounds and then he wore you out with it during the games. Could do them blindfolded I bet.