Overall the CS at DHS is not very good. We prefer a TS at the 50's Prime Time Cafe when we are at the Studios. If we do CS we find the Backlot Express to be edible.
There are no boats from DHS to DTD, so taking a boat to WPE is not possible. To get to WPE you would have to leave the Studios, take a bus or boat to a resort and transfer at the resort to a DTD bus. I don't think that makes sense just for lunch.
Have a Great Trip