Damaging to the brand? It should be, but many other marques are in the same situation for the bigger engines.
I'm pretty sure all 2.0TSI engines currently don't have WLTP compliance verified, but are expected to pass, so some models are being built at risk and transported then held until the certification is confirmed. This includes the Polo GTI which is due to start production again about now - but that model comes with a 5 week wait after production when it is shipped all the way from South Africa (but does help the paint cure!).
I'd approach your dealer if you want to cancel. If build wait is forecast but not yet locked in, they can cancel without penalty and give you your deposit back. I would ask on the basis of the longer than anticipated wait.
All this WLTP sh!te because of dieselgate and the US litigation, yet the Yanks aren't adopting WLTP becsuse they won't give up their V8s while petrol is $3 a gallon.