I'm a fan
As for combating players trying to take out your C, if she gets into a good position, she'll be able to minimize injury. If she puts a good lick on the incoming runner, I'm guessing word will spread not to do that anymore =) Think football (get lower than the other person).
I can talk softball all day
1. In softball the player can not make contact with the catcher unless they are in the act of sliding. If the catcher blocks the plate without the ball it is an obstruction and the runner is given the base and no out is recorded. As a coach you should look for a catcher who does block the plate without the ball and have a conference with the umpire before it an issue.
2. The positioning of the catcher should be first and foremost to avoid injury. Always have your catcher set up for a block of the plate with the joint of the knee in position to bend like it is designed which means their toes should be pointing toward third base. They should always be on or inside baseline from third to allow them to slide into position once they receive the throw.
Any contact with the catcher that results in what is deemed to be malicious will result in the player being thrown out of the game. Teaching your player to run over a catcher is not only bad sportsmanship but also could cost you a game. By the same token all players should slide hard into home and if the catcher puts their knees in a bad position it could end up costing them the rest of the season not just an out or a game. Safety first, always.