How much are you lowering by?You can guarantee there is always something causing delays, especially when you book early on Saturdays when the main goal is to be in and out!
I always thought rears were more tricky to do alignment on and required a dealer/specialist, seems like they could have done it but time was an issue? Be interesting to see if you feel a difference now the fronts have been dailed in.
On the topic of alignment I am considering some lowering springs for the Polo GTI as OEM ride height isn’t very pleasing on the eye… is it good practise to have an alignment done afterwards or would that be in an ideal world and essentially wouldn’t really need it?
And yes I'd get a check of alignment done at the very least. Give it a few days of driving to settle aswell before the alignment.