The problem with installing a beta of a major release like this on your primary phone (iPad is another story) is not when you are essentially at home and can restore at almost anytime. The problem is if you are away from home, like in vacation or something and you have to rely on your phone, you don’t want an unknown issue that will break an important thing in your phone like LTE, or even phone call issues that can happen.
For my experience, beta is not worth it on my primary devices when I can easily put them on my iPad and this year there’s not enough new feature to make me want the update so bad.