Yup. We only have some much training time. I'd imagine back in the day there were standard ratios of how clubs split their training time which would have featured X many hours practising set pieces. RDZ clearly doesn't feel that that is time well spent.
He's not going to sacrifice time spent on...
Definitely something we can improve on over the summer. On the positive it's encouraging to think there's still areas to work on despite having such a great season.