I've got a question.
I plan on possibly competing in the future in powerlifting, but I want all around leg developement and athletic carry over too.
What about doing full squats for warmups until the last warmup set before your work sets, then switch to PL style?
As you get stronger you will be full squatting and PL squatting more and more and will be able to do both well.
The only negative I can see to this is that the full squat is training a different groove and range of motion so you don't get as much neural efficiency built for the PL style as you could if you did all warmups sets PL style.