Well, I have over 30 years coaching HS (and college and...). First, the best and worst moments of my coaching career have been working with my daughters. From the highs (state champ, certified as KB instructor, both competing in the discus at state in the finals) to the lows (coaching your own daughter!), it is an experience in giving and learning.
Do NOT ignore the short warm up. The Pelvic Tilt (the second exercise) is something that might do a world of good for her the rest of her life. Those three moves are perfect...if she throws the javelin, it's the best thing I know. Those two extra stretches, from my experience, won't do much for a 14 year old girl, but teach it so she can keep it in her pocket for "later." And, there is always later...
I STRONGLY suggest you switch out the shoe for half a glass of water. Use a plastic cup and put it on her fist. In my experience, nothing teaches the focus of strength for teen females better than this. If she bends the elbow, loses Zenith, or stumbles, we say "Baptized!" and we all laugh. She will buckle down, flow better, tighten up and learn the basics of strength.
Whether or not this is a good or bad choice, don't worry about it. We can't help but open the internet and fine more things to do. Trust the process. Here is what we know for sure: I doubt she will get hurt doing this...seriously doubt it, she will certainly knit up the area between the shoulders and hips, she will learn to pack and move the shoulders, she will learn the hip hinge and the squat, her grip will improve, she will learn how to snap the glutes (superior sports performance key one) and she will have some time with you.
Can you do more "more?" Sure, but don't. Trust the process. Have one or two tiny assessments like a Vertical Jump or Three Long Jumps in a row...boing, boing, boing style. Maybe even a biannual FMS test...whatever. Any kind of "this is better" assessment is all you need. Lindsay add sixteen feet to her shot put during high school...that was one simple assessment.
I have a book on my website, "From Dad to Grad." You can get it on Kindle, but they make you pay for it (I wanted it free or 99 cents). I am expanding it into another edition, but I wrote this when Kelly, who is now a mother and in her third year as a First Grade teacher) was 14. Let me just say this: it happens fast and enjoy it.
You could do far worse than S and S...I'm not so sure better. If you are looking for the Perfect Program, be sure to watch "Groundhog Day." The writer said in an interview that they had figured that he repeated that same day "tens of thousands of times" before he figured out how to move on.
A perfect program is like that: you will let a lot of living go by before you ever find it...I doubt you will. So, dive into the deep waters of S and S and, like Captain Pickard: "Make it so." Focus on the journey towards the perfect swing and Tai Chi Get Up and enjoy the fruits of your labor.
And, I envy you a bit...