I love the tast butter gives my pie crust but want to eliminate the Crisco. Can I use solid coconut oil?

If the butter flavor is what you're after, you could also go with an all-butter crust: https://food52.com/blog/8962-four-twenty-blackbirds-all-butter-pie-crust

Here's more on how various fats affect the taste of your pie crust: https://food52.com/blog/14770-baking-fats-butter-versus-the-world

You can! Here's a great recipe and guide: https://food52.com/blog/11720-how-to-make-gluten-and-dairy-free-pie-crust