Again, I love Maxpass and think it's great. Big fan. Often recommend it. But for $75 a day, I think a family of five can definitely make the call that the cost isn't worth the benefit for them. If you compare "what we did with traditional FP" vs. "what we could have done with Maxpass," it's definitely possible to decide that the difference in those days wouldn't be worth $75.
A couple of weeks ago, I went with some first-time visitor friends - a family of four, visiting for 2.5 days (I joined for one). Maxpass wasn't in their budget, so even though it was busy Spring Break season, they (we) just used good old traditional FPs, taking turns acting as the runner. Was it as good as having Maxpass? No, and I certainly missed the efficiency of booking on my phone. But did it "break" their trip? Not at all - in fact, my friend told me afterward that she was glad they hadn't spent the money on Maxpass "since we did everything we wanted to anyway." They had a wonderful time, including using many FPs, and are hoping to come back in a couple of years. So even though I personally think Maxpass is awesome and usually recommend it, I can also say with confidence that it's not "necessary."
Also, just to address one point by a PP, if you're using the machines and the times change while you're pulling, you're only going to have a 5-minute difference - say, your first few FPs will be for 10:10-11:10, and then the last few will be 10:15-11:15 - shouldn't really make much of a difference.