Those are very good reasons to switch. But if you like her, I would probably suggest first telling her straight out that you need more from therapy, that you want to talk more about deeper issues, and that you can't simply just "do" things. Hopefully once you bring it up, you guys can talk about it and see if that's an option. That was happening with my T and I just said (through email because I was too chicken to do it face to face) that I thought we were focusing too much on certain things and not on other things and that certain things needed to change and she was VERY receptive, understanding and happy I brought it up!
But maybe you do need the switch. If you don't sense any change after talking to her, I would just tell her its really not going how you need it to, and you need to take a break. You don't necessarily need to tell her you've picked a new therapist or anything.
Goodluck!