Don't care who you are whenever you change the focus of training you will get soreness, for example if you are doing 8-12 reps then change to 1-5 reps you will get soreness for at least one week thats why many coaches perfer to keep the reps the same all year round. So if you are a speed/power guy training early fall instead of going 3×10 go 10×3 or 20×2 every 30-60sec.
Agreed. Even a slight change in exercises might cause some discomfort when not needed. That is why late in the season it is best to keep it simple and stick with what you had been doing.