what does my progression say about my potential?

What advice would you give younger runners (I'm a sophomore with a PR of 21:46) to try to make a bigger jump (specifically for XC) similar to a progression like yours?

I’m not really the right person to ask, there are a lot of people faster than me, and I am essentially self coached so take my advice with a grain of salt. That being said, I think by far in a way the most important thing is consistency. If you wanna run well this fall for XC it will be mostly determined by what you do this summer. You have to figure out what kind of volume you can handle, and decide accordingly, but you need to be running as much as you can while staying healthy and feeling good. Do well thought out workouts every week. Do a long run, do strides. Do the little things, and time will just fall off. As someone who was not fast when I started, the great thing about it is time will just fall off extremely fast. Most of all just make sure you are enjoying the journey, because that is the only thing that makes it worth it.

Ask not what your progression says about your potential, ask what your potential says about your progression and progress accordingly.

Lots of potential.