I disagree on the titan shoulder charge as it is. Maybe if it took longer to be ready than Juggernaut's shield, but as it is it's too easy for shotgun-spamming Titans to sprint around corners with how most maps are set up. I have a friend who mains a titan, striker with shoulder charge specifically when he wants to have fun, and he himself complained that it was annoying when he switched characters and ended up on the receiving end.