I think he's heavily involved in all first team player acquisitions. Manager and DoF decide what's a priority, they both have their ideas and come to an agreement. Obviously some are heavily backed by one of them, Klaassen from Koeman, Lookman from Walsh for example.
Walsh wanted Allardyce from start after Koeman was sacked (that's enough for him to be sacked) and pushed for it.
He travels for discussions with teams and players, as well. He actually does a fair amount but Moshiri is rightfully wanting more value for money and that's why we've looked at other people to step in.
Walsh wasn't even our first pick for the job, Moshiri wanted Monchi.