Mbeumo has to play if he's fit. While he is missing a fair amount of chances, he's consistently getting into those positions in the first place which is so important. If his execution improved he'd be a serious player at this level. Toney brings so much to our play, but our new approach has him dropping very deep and isn't getting in the box often at all. I would feel a bit hard done by if I were him, but there is no question that it is allowing the team to thrive.
Wissa, still does and always needed a fairly long period of adaptation. But you can see there is a special player there. I don't think the answer currently is to play him week in week out, but he probably should expect that for next season! He needs to have a better understanding with Toney though, he doesn't have that same level as Toney/Mbeumo so both are fairly isolated figures up front.