Just a comment about the need to charge a MB+ every night.The trouble with the MB+ is that you have to remove it from the watchband and from the puck holder in order to charge it, which I did every night while at WDW.
Many guests may not need to charge it daily or for it to even have partial charge to use all passive features of the MB+. The only 2 things that require a battery charge is for the Light interactions for long range NFC communication, and attraction pictures where there are no Tap points at the attraction exit.
Dave