Definitely a bummer not to get front row when you've used a fastpass for it! We had an MSEP fastpass for the first night of our trip (a crowded Saturday). Like you, we wanted our 2-year-old to be able to see, and didn't want to have to stake out spots way ahead of time. We arrived right at the beginning of the fastpass window and were surprised by how many people were already there. We were very fortunate to grab the last spots on the curb, which made it "worth it" for us, but I would have been very disappointed if we hadn't been able to see well. We actually had MSEP fastpasses for another night as well (MSEP and FoF were probably our favorite things that trip). That time, learning from our previous experience, we got there 10 minutes before the window opened and had no trouble at all getting great spots. So, I would agree that you need to be prepared to arrive before the fastpass window opens, but it's a good experience if you're willing to do that. We just grabbed snacks ahead of time and used the down time as a break. Amazingly enough, my very active two-year-old was so excited to see the parade that she had no problem sitting and waiting for it!