Some fabulous insight from Efteling on how they're planning on reducing queueing and waiting times... https://www.efteling.com/nl/blog/backstage/20190114-kortere-wachtrijen
Highlights:
-Longer opening times
-Better flow at main entrance and car park
-New system on Vogel Rok to allow 3 trains to run
-Purchasing of a 5th train for Joris in case one requires maintenance
-Introduction of SRQ on Flying Dutchman, following successful introductions on Bob, Baron, Symbolica, Joris and Python
-New version of the app that notifies you when a queue reaches a certain length
-Since last year, they've adopted the UK way of closing queue lines (IE at park close, not closing them so the ride stops running at park close). This isn't as common in Europe as you'd expect
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The park are still preserving with their version of Reserve n Ride, making further adjustments. I've yet to use the system (visiting only on extremely quiet days since it's introduction), but it was experienced some problems during its time. It's nice to see them learning and trying with it, but I wonder if they're clinging onto false hope trying to get it to work.