Having just done 2 days at Universal/Islands, one day at SeaWorld, and a night at Not So Scary, I have a new-found appreciation for My Magic Plus and the MagicBands.
We stayed at Lowes Royal Pacific at Universal, so in order to function on a normal day we had to juggle everyone's park ticket (printed on thin cardstock), our express passes (also printed on thin cardstock) the hotel key cards, our baggage claim slip, and a parking pass. Not really a problem per-se, but the express passes had to be pulled out every time we used them (which I'm sure thrilled the guests we were passing in line). By the end of the first day they were looking pretty ragged, and by the end of day two, being pulled out several more times (and being wet due to their super-aggressive water rides) had nearly disintegrated them. Suddenly, Disney's system (which had already worked great for us on two prior trips) was making more and more sense. I really don't see why it would be so difficult for Universal to be able to unify my park pass, Express Pass, and hotel key and put them all on a single plastic card that can hold up to two days of theme parking.
For the record, our magic bands worked flawlessly (again) for Not so Scary, and we were even able to schedule and make two FP+ times before the party officially started.
I'm not even sure we were supposed to be able to book those, considering we didn't have any normal Disney park tickets this trip.