If the main bus tour isn't running, and they are still charging full price, then I think it would be better to wait. The exhibits at the Visitors Center used to be FREE, which gives you some idea of how they stack up in comparison to the bus tour. There are two other bus rides that cost an additional $20, but the main tour is included in the entrance price.
A press release on the Kennedy Space Center site says the park will reopen on the 16th but that the KSC tour will not be offered. Nothing was said about when the tour would resume.