Unexpectedly(on my behalf) Gray seems to have a high threshold and could be the quality of player that could perform in a top four team. We still have to wait for some time to see if he can consistently maintain his form.
Townsend would be an asset to most squads but you would hope that he would not be starting every week and that reflects the lack of depth in the squad.
From the little I have seen of him Longstaff would fill the position that we would have hoped Gbamin would fill and RB does know him well and will know what he may be capable of.
So far, the signings he has made on the shoestring budget have been worthwhile and Longstaff if he is signed may also prove value for money, he certainly would seem to be physically capable at least.