Everyone starts with good intentions, but less than 20% pf pre-meds end up in medical school. Having a bird in hand is always nice IF you can afford it. Four and four at SLU is going to be EXPENSIVE, and it’s a conditional admit. If she’s full pay, you’ll be in for well over half a million by the time she starts her internship.
I wouldn’t consider any of the other schools “better,” just different. I’m guessing based on Pitt and Penn State that you live in PA and they are vastly less expensive.
It really boils down to how confident you feel in the conditional admit, how much aid you received and whether or not you can afford it without causing harm to your personal finances or your ability to send other kids to college.