Chiming in on the worth of wands...
Personally, I would rather pay the $50 each for a wand at Universal, and cut back somewhere else than forego a wand.
Maybe it's because my kid is a die-hard Harry Potter fan, but the ability to do 'magic' in the windows was equal to (or greater than) any of the rides in terms of enjoyment. Moreover, my kid really, really wanted to have the "wand choose him," so we went to the wand ceremony 6 times before he was finally picked. So, $100 for two wands (because my other kid likes HP, even if he's not Mr. Superfan) was a known, budgeted expense.
Wands at Universal are not just toys or souvenirs. I'm actually extremely thrifty (my husband would say cheap) when it comes to buying stuff in the parks, and I usually get things at a discount prior to the trip and bring them with us (got my kids t-shirts for Universal themed areas like Jurassic World, Minions, and Harry Potter for about $3-5 each and they wore one each day). But the ability to interact with the Wizarding World exhibits is so integral to the park experience that I feel like it would be a tease to take my kids there and not let them have a wand (YMMV, and some kids may not care so much, but for my HP fans, the wands are really important).