I'm honestly not sure how many, if any , of them were RD signings.
Big Pierre sold Cifit to Pedro.
Only guy I know for certain was RD's was Ajer, in as a top Norwegian youth.
I'm inclined to think most of the signings during his time were Lawwell playing General Manager and cutting deals for players he thought he could hand to the coach to integrate. Doubt RD had any real say at all.
Hence, D. Desmond has had enough after losing the semi on pens to the Monkeys and calls time on the Lawwell 'Football Manager' experiment, bringing in BR to govern all things fotoball and sticking Pl back in his finance box.